Telesis PX24 IP PBX Business Phone System
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Design and manufacture IP PBX Business Phone System, Switching System, VoIP Gateway, and Signaling Converter  

Telesis Telecom Glossary

This glossary is intended to define terms and abbreviations that are commonly used throughout this web site. This glossary is not all-inclusive. New terms and abbreviations may emerge with time and releases of new Telesis services and products.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

10 BaseT ethernet
An ethernet specification for providing 10 Mbps over twisted pair wiring.

100 BaseT ethernet
An ethernet specification for providing 100 Mbps over twisted pair wiring.

1VF
Abbreviation for single voice frequency signaling in CIS signaling types.

2B+D
ISDN basic rate. Two 64Kbps B channels for customer use and one 16 Kbps D channel for signaling.

2B1Q
Line code for ISDN basic rate interface. Two-binary, one-quaternary.

30B+D
ISDN primary rate. 30 64Kbps B channels for customer use and one 64 Kbps D channel for signaling.

3PTY
ISDN supplementary service. Three party conference. 

 

A-a

  

abbreviated dialing
A user service feature that permits the user to dial fewer digits to access a destination than are required under the nominal numbering plan. Synonym: Speed dialing.

AC
Abbreviation for alternate current.

access code
The digits, which must be dialed to be connected to a particular trunk or terminal.

ACD
Abbreviation for automatic call distributor. A device or algorithm that distributes incoming calls to a specific group of terminals.

adjunct protocol
Data protocol between an adjunct server and a main system for provisioning.

adjunct server
An auxiliary server, which powers a main system. The adjunct server may control call processing, routing, system and user services in the main system with provisioning.

AES
Abbreviation for advanced encryption standard. The Advanced Encryption Standard is a FIPS approved cryptographic algorithm that can be used to protect electronic data. The AES algorithm uses symmetric block cipher that can encrypt (encipher) and decrypt (decipher) information.

alerting signal
A signal sent to a destination to indicate an incoming call. To illustrate, rings towards subscribers.

alternate routing
A means of distributing call traffic over a number of routes leading to the same destination.

AMI
Abbreviation for alternate mark inversion. A pseudoternary signal, representing binary digits, in which successive marks are of alternately positive and negative polarity and the absolute values of their amplitudes are normally equal and spaces are of zero amplitude.

AN
Abbreviation for access network.

ANI
Abbreviation for automatic number identification. A service feature in which the directory number or equipment number of a calling station is automatically obtained.

AOC
ISDN supplementary service. Advice of charge.

A-party
Calling party.

API
Abbreviation for application program interface. A set of software calls and routines that can be referenced by an application program in order to access supporting network services.

AT&T
US public company, which is the provider of telephone services.

attendant positions
A system service used by an operator, to assist users in call completion and use of special services.

audio codec
An electronic device or algorithm that converts analog audio signals into digital form and, compresses them to conserve bandwidth on a transmission path.

authorization
Access rights granted to a user for using services.

auto attendant
A service feature in which the called terminal automatically responds to the calling signal and the call may be established whether or not the called terminal is attended by an operator.

automatic dialing
A user service that permits a user, when encountering a busy condition, to instruct the system to reestablish the call automatically. 

 

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B-b

  

baseline authentication
For H.323 endpoint-to-gatekeeper registration, RAS message authentication may be according to H.235 Baseline Security Profile profile. This security service supports authentication of selected fields only, but does not provide full message integrity. The authentication-only security profile may be preferable for the messages traversing NAT/firewall devices. Hashing algorithm is the password-based HMAC-SHA1-96.

baseline integrity
For H.323 endpoint-to-gatekeeper registration, RAS message authentication and integrity may be according to H.235 Baseline Security Profile standards. This is a combined security combining both message integrity and the authentication. Hashing algorithm is the password-based HMAC-SHA1-96.

BAT
Abbreviation for battery (or battery terminal).

BCC
Abbreviation for bearer channel connection in V5.2 protocol.

BDP
Abbreviation for busy display panel.

BEC
Abbreviation for basic error correction in SS7 signaling. Mainly used for terresterial links. It is a non-compelled, positive/negative acknowledgement, retransmission error correction system. A signal unit which has been transmitted is retained at the transmitting signaling link terminal until a positive acknowledgement for that signal unit is received. If a negative acknowledgement is received, then the transmission of new signal units is interrupted and those signal units which have been transmitted but not yet positively acknowledged starting with that indicated by the negative acknowledgement will be retransmitted once, in the order in which they were first transmitted.

BHCA
Abbreviation for busy hour call attempts.

BITE
Abbreviation for backward interworking telephony event (an ITU-T definition).

B-party
Called party.

BRA
Abbreviation for basic rate access.

BRI
Abbreviation for basic rate interface.

BS
Abbreviation for base station - the fixed radio component of a cordless link, single channel or multi channel. Term also used in cellular radio.

busy hour
The peak 60 minute period during a business day when the largest call traffic is handled.

 

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C-c

Caller ID
A network service feature that permits the recipient of an incoming call to determine, even before answering, the number from which the incoming call is being placed.

call forwarding busy  
A user service in which incoming calls are rerouted automatically to another number when the user is busy.

call forwarding no reply  
A user service in which incoming calls are rerouted automatically to another number when the user does not reply in a predefined time.

call forwarding unconditional  
A user service in which all incoming calls are rerouted automatically to another number.

call hold
A user service in which a user may retain an existing call while accepting or originating another call.

call pickup  
A user service in which a user may dial a predetermined code to answer incoming calls that are directed to another user.

call restriction
A system service that prevents selected terminals from exercising one or more user services.

call waiting
A service that alerts the called party that another call is waiting.

camp on
A method of holding a call on a line, which is in use.

CAS
Abbreviation for channel associated signaling.

CC
Abbreviation for call control.

CCP
Abbreviation for call control primitives.

CCBS
ISDN supplementary service. Call completion to busy subscriber.

CCE
Abbreviation for call control engine.

CCNR
ISDN supplementary service. Call completion on no reply.

CCS
Abbreviation for common channel signaling.

CDR
Abbreviation for call detail record. The record may include the user making the call, dialed digits, date, time, duration, charging information. Synonym: CMDR

CED tone
When the terminating fax machine answers the call, it sends a called terminal identification or CED tone. As defined in the ITU-T T.30 recommendtion, it is a continuous 2100 hz signal with a duration between 2.6 and 4 seconds. Synonym: ANS (Answer)tone.

CEPT
Abbreviation for Conference of European Posts and Telecommunications.

CFU
ISDN supplementary service. Call forwarding unconditional.

CFNR
ISDN supplementary service. Call forwarding no reply.

channel bank
The part of a carrier-multiplex terminal that performs the first step of modulation by multiplexing a group of channels into a higher bandwidth analog channel or higher bit-rate digital channel and, conversely, demultiplexes these aggregates back into individual channels.

CIC
Abbreviation for circuit identification code.

CIS
Abbreviation for Commonwealth of Independent States.

CIS signaling
Signaling systems widely employed in CIS countries.

CL
Abbreviation for connection line in CIS signaling.

CLIP
ISDN supplementary service. Calling line identification presentation.

CLIR
ISDN supplementary service. Calling line identification restriction.

CMDR
Abbreviation for call message detail record. Synonym: CDR

CNG tone
When the originating fax machine calls, it sends a calling terminal identification or CNG tone. As defined in the ITU-T T.30 recommendtion, it is a 1100 hz signal. The cadence is half second ON and 3 seconds OFF, i.e., a half second 1100 pulse in every three seconds.

CO
Abbreviation for central office. A common carrier switching center in which trunks and loops are terminated and switched.

COLP
ISDN supplementary service. Connected line identification presentation.

COLR
ISDN supplementary service. Connected line identification restriction.

CPE
Abbreviation for customer premises equipment.

CPU
Abbreviation for central processing unit.

CRC4
Abbreviation for cyclic redundancy check 4. It is an error detection scheme.

CRM
Abbreviation for customer releations management.

 

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D-d

DASF
The name of the Telesis analog subscriber line card.

DATF
The name of the Telesis analog DC loop trunk card.

datagram
In packet switching, a self contained packet that is independent of other packets, that does not require acknowledgement.

DC
Abbreviation for direct current.

DDI
ISDN supplementary service. Direct dialing in.

DDS
The name of the Telesis digital subscriber line card.

DECT
Abbreviation for digital enhanced cordless telecommunications, the ETSI standard.

DEM
The name of the Telesis analog E&M trunk card.

DHCP
Abbreviation for dynamic host configuration protocol. It is a network protocol that enables a server to automatically assign an IP address to a client from a defined range of IP addresses configured for a given network.

dial tone
An audible tone indicating that the telephony system is ready to receive dialing digits.

DID
Abbreviation for direct inward dialing. A system service that allows inward-directed calls to the system to reach a specific user without an intervention.

Diffserv
Differentiated Services that provides Quality of Service (QoS) on IP network.

DLC
Abbreviation for digital loop carrier.

DNS
Abbreviation for domain name system.

Dynamic DNS update
Methods enabling client hardware or software (especially with dynamic public IP address) to register and update its hostname records within a DNS server, whenever its IP address changes. Dynamic DNS update is useful for a client hardware or software with the dynamic public IP address which changes periodically. It allows the system administrator to make sure he can always access a client from anywhere in the world with using its registered hostname without worrying about its dynamic public IP address.

do not disturb
A user service that prevents incoming calls. Outgoig calls are still possible when the service is active.

DPC
Abbreviation for destination point code in SS7 signaling.

DSLAM
Abbreviation for digital subscriber line access multiplexer.

DSP
Abbreviation for digital signal processor.

DSS1
Abbreviation for digital subscriber signaling system No. 1. It is a digital signaling protocol used for the ISDN. Synonym: Euro-ISDN.

DTMF
Abbreviation for dual tone multifrequency. It is used for telephone signaling over the line.

DTS200S
A digital telephone set designed and manufactured by Telesis A.S.

DTS821
A digital telephone set designed and manufactured by Telesis A.S.

DTS821S
A digital telephone set designed and manufactured by Telesis A.S.

DVR
Abbreviation for digital voice recorder.

DWDI
Abbreviation for direct web dialing in. A Telesis WePhone service allowing clients to dial analog, digital, or IP users of the Telesis system from their web browsers.

 

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E-e

E1
European E-carrier system to transmit digitized voice signals and digital data. Data rate is 2.048Mbps.

E&M signaling
In telephony, an arrangement that uses separate leads, called the E lead and M lead, for signaling and supervisory purposes. The near end signals the far end by applying -48 vdc to the M lead, which results in a ground being applied to the far end`s E lead. The E originally stood for ear and the M originally stood for mouth.

echo canceler
A device or algorithm for connection to a two way telephone circuit to attenuate echo signals in one direction caused by signals in the other direction.

ECMA
Abbreviation for European Computer Manufacturers Association.

ECT
ISDN supplementary service. Explicit call transfer.

EMC
Abbreviation for electro-magnetic compatibility.

en-bloc signaling
Signaling in which address digits are transmitted in one or more blocks, each block containing sufficient address information to enable switching centers to carry out progressive onward routing.

erlang
A dimensionless unit of the average traffic intensity (occupancy) of a facility during a period of time, usually a busy hour. Erlangs, a number between 0 and 1, inclusive, is expressed as the ratio of (a) the time during which a facility is continuously or cumulatively occupied to (b) the time that the facility is available for occupancy.

EOS
Abbreviation for end of selection.

ETR
Abbreviation for ETSI Technical Report.

ETS
Abbreviation for European Telecommunications Standard.

ETSI
Abbreviation for European Telecommunications Standards Institute.

 

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F-f

Fax pass-through over SIP
It is a method for the fax transmission over SIP. In this method, the fax transmission is similar to a G.711-based VoIP voice call after T.30 fax tones detection. On detection of fax tones, the used VoIP codec is switched to G.711.

FCC
Abbreviation for from call control. Communication from call control to port control.

FCC
Abbreviation for US Federal Communications Commission.

FIAS
Abbreviation for Fidelio Interface Application Specification.

FITE
Abbreviation for forward interworking telephony event (an ITU-T deifinition).

four-wire
A two-way transmission circuit that uses one pair for the transmit and another pair for the receive directions.

FIPS
Abbreviation for Federal Information Processing Standard.

firewall
A device or algorithm to prevent unauthorized access to a network.

freeware
A software, which is available free of charge.

FSK
Abbreviation for frequency shift keying. Frequency modulation in which the modulating signal shifts the output frequency between predetermined values.

FTP
Abbreviation for file transfer protocol.

full-duplex
Transmission in two directions simulatenously.

FXO
Abbreviation for foreign exchange office.

FXS
Abbreviation for foreign exchange station.

 

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G-g

G.168
An ITU-T recommendation for Digital network echo cancellers.

G.711
An ITU standard for audio codec that provides audio with the bit rate of 64 Kbps using either A-Law or mu-Law PCM methods.

G.723.1
An ITU standard for audio codec that compresses audio to either 6.3 Kbps or 5.3 Kbps.

G.729
An ITU standard for audio codec that compresses audio to 8 Kbps.

GAP
Abbreviation for generic access profile of DECT.

Global Title
Dialed digits.

GND
Abbreviation for ground or earth (or ground terminal).

GSM
Abbreviation for Global System for Mobile, the digital cellular radio system specified by ETSI and now adopted in many countries worldwide.

 

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H-h

H.225.0
It is call signaling used to establish calls between two H.323 entities. It was derived from Q.931 (ISDN call signaling).

H.323
An umbrella document that describes the usage of H.225.0, H.245, and other related documents for delivery of packet-based multimedia conferencing services.

H.323 gatekeeper
It is a component in the H.323 system which is used for admission control and address resolution The gatekeeper may allow calls to be placed directly between endpoints or it may route the call signaling through itself.

H.450
The complete series of supplementary service specifications for H.323.

handover
The procedure whereby communications between a cordless terminal and a basestation are automatically routed via an alternative basestation (or possibly via an alternative channel to the same base station) when this is necessary and appropriate to maintain or improve communications.

HMAC
Abbreviation for hash message authentication code.

HDB3
Abbreviation for high density bipolar of order 3. It is a line code used for digital transmission.

HDLC
Abbreviation for high level data link control. A Link-Level protocol used to facilitate reliable point-to-point transmission of a data packet.

HOLD
ISDN supplementary service. Call hold.

hop count
In a communications network, the number of legs traversed by a packet between its source and destination. Note: Hop count may be used to determine the time-to-live for some packets.

hotline
A system feature that allows a user or line to dial a preprogrammed number automatically after off-hook or seizure.

howler tone
A tone (usually a distinctive loud tone with increasing intensity) to attract the attention of a subscriber, whose telephone has been left in the off-hook state long time without any activity.

Hybrid IP PBX
A Hybrid IP PBX provides analog TDM, digital TDM, and VoIP capabilities at the same time. Consequently, it is possible to use a mixture of analog, digital, and IP based terminals like phones in the same system. Furthermore, a Hybrid IP PBX offers similar features and services to both TDM and IP users.

 

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I-i

IAM
Abbreviation for initial address message in SS7 signaling.

IEEE
Abbreviation for Institute of Electrical and Electronics Engineers.

IETF
Abbreviation for Internet Engineering Task Force.

IN
Abbreviation for intelligent network.

IP
Abbreviation for internet protocol.

ISD
Abbreviation for international subscribers dialing.

ISDN
Abbreviation for integrated services digital network.

ISO
Abbreviation for International Organization for Standardization.

ISUP
Abbreviation for isdn user part.

ISUP hop counter procedure
The ISUP hop counter procedure is used to detect call set-up looping that can be caused by incorrect routing data in SS7 signaling. An originating exchange or an intermadiate exchange shall originate the hop counter procedure if the hop counter capability is activated. The outgoing IAM shall include the hop counter parameter containing the initial count value.

ITS821
VoIP telephone set designed and manufactured by Telesis A.S.

ITU-T
Abbreviation for International Telecommunication Union - Telecommunication Standardization Bureau.

 

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J-j

jitter
Short term variation of the significant instants of a digital signal from ideal positions in time.

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K-k

 

key
Information (usually a sequence of random or pseudorandom binary digits) used initially to set up and periodically change the operations performed in crypto-equipment for the purpose of encrypting or decrypting.

 

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L-l

LB
Abbreviation for local battery.

LCD
Abbreviation for liquid crystal display.

LCR
Abbreviation for least cost routing. Used for selecting the most economical route available for each outgoing call based on called number, time, and other other conditions.

LE
Abbreviation for local exchange. An exchange in which trunks terminate. Synonym: End Office.

LAN
Abbreviation for local area network.

 

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M-m

mark
In digital transmission, the binary state `one`.

MCID
ISDN supplementary service. Malicious call identification.

MD
Abbreviation for message digest.

MD5
Message digest algorithm 5. The algorithm produces a 128 bit long message digest or fingerprint of a message with any length.

MDB
Abbreviation for Microsoft database.

message waiting indication
A user service that provides an indication to a user already engaged in an established call that one or more calls are awaiting connection.

MFCR2
Abbreviation for multifrequency compelled R2.

MFC R1.5
This register signaling is also called Pulse shuttle (PS). Pulse shuttle is an MF signaling using the frequencies of ITU-T R1, whereas it uses handshaking methods for receiving and sending digits similar to that of ITU-T R2. This signaling method does not support calling line identification. However if calling line identification is required it is possible to switch from MFC R1.5 to Dial pulse signaling. Due to timing periods of backward and forward tones used in this signaling, to route out a call from pulse shuttle E1, accumulation of digits before routing is required.

MFR1
Abbreviation for multifrequency R1.

MIM
Abbreviation for man in the middle.

MIPS
Abbreviation for million instructions per second.

MMI
Abbreviation for man machine interface.

MML
Abbreviation for man machine language.

MSN
ISDN supplementary service. Multiple subscriber number.

MTBF
Abbreviation for mean time between failures.

MTP
Abbreviation for messsage transfer part.

multicast
Multicast is the delivery of information to a group of host.

music on hold
A system service that provides music for held users and trunks.

 

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N-n

Nano
A next-generation IP PBX to home and small business market. The Nano is a complete solution in the same box, which also features an executive digital telephone offering advanced telephony tasks. Synonym: Telesis Nano, PX24N. 

NAT
Abbreviation for network address translation.

night restriction
A user or system service, which manually or automatically modifies call authorizations in the night mode.

NGN
Abbreviation for next generation network.

NOA
Abbreviation for nature of address.

non-volatile memory
A memory that requires no power to maintain the stored information.

NT
Abbreviation for network termination.

NWD
Abbreviation for nation wide dailing.

 

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O-o

OCL
Abbreviation for ordered connection line in CIS signaling.

O&M
Abbreviation for operations and maintenance.

OAM
Abbreviation for operations, administration and maintenance.

OPC
Abbreviation for originating point code in SS7 signaling.

OSI
Abbreviation for open systems interconnection. The ISO standard for communications, a seven layer reference model for protocol specification.

overlap signaling
overlap signaling allows the calling party to provide additional dialed digits to the called party during the call establishment procedure.

 

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P-p

PABX
Abbreviation for private automatic branch exchange.

PBX
Abbreviation for private branch exchange.

PC
Abbreviation for personal computer.

PCM
Abbreviation for pulse code modulation.

PCR
Abbreviation for preventive cyclic retransmission in SS7 signaling. It is a non-compelled, positive acknowledgement, cyclic retransmission, forward error correction system. Mainly used for satellite links. A signal unit which has been transmitted is retained at the transmitting signaling link terminal until a positive acknowledgement for that signal unit is received. During the period when there are no new signal units to be transmitted all the signal units which have not yet been positively acknowledged are retransmitted cyclically. The forced retransmission procedure is defined to ensure that forward error correction occurs in adverse conditions (e.g. high error rate and/or high traffic loading). When a predetermined number of retained, unacknowledged signal units exists, the transmission of new signal units is interrupted and the retained signal units are retransmitted cyclically until the number of unacknowledged signal units is reduced.

PMS
Abbreviation for property management system.

PMSI
Abbreviation for property management system interface.

point-to-multipoint connection
More than one transmitter and receiver are active at a time in each direction of transmission in ISDN basic rate access.

point-to-point connection
Only one transmitter and receiver are active at a time in each direction of transmission in ISDN basic rate access.

PPC
Abbreviation for pocket PC.

PRA
Abbreviation for primary rate access.

PRI
Abbreviation for primary rate interface.

PSTN
Abbreviation for public swithed telephone network. A domestic telecommunications network usually accessed by telephones, key telephone systems, private branch exchange trunks, and data arrangements.

pulse pkt1 (multifrequency pkt1)
Pulse packet register signaling uses R1 frequencies with 50msec on/off periods. Called number, calling party category and calling party number are sent in two or three packages, depending on the received R1 tones from the upper exchange. For a relevant outgoing call if the star count is marked as zero or one then, this is considered to be a national call. For two or three star count, this call is considered to be an international call. For the national case the first packet contains the first digit of the called party number and the category, the second packet contains the called number, calling party category and calling party number. For the international case, the first packet contains the first digit of the called party number and the category, the second packet contains only the called international number and the third packet after the request from the upper exchange contains calling party number and calling party category. Calling party number is fixed to even digits, so that if the actual number is less than seven digits leading zeros are added.

pulse pkt2 (multifrequency pkt2)
Pulse packet register signaling uses R1 frequencies with 50msec on/off periods. After the request from the upper exchange, called number, calling party category and calling party number are sent in one package with a packet terminator. The correct reception of the packet is confirmed by the upper exchange.

pulse pkt3a (multifrequency pkt3a)
Pulse packet register signaling uses R1 frequencies with 50msec on/off periods. The packet that contains call category (signal number 13), echo info (signal number 10), called number and packet terminator (signal number 11) is sent in one package after the request from the upper exchange. The correct reception of the packet is confirmed by the upper exchange. Since the called number is sent in a package with predefined timing periods, to route out a call from Pulse Pkt3a E1, accumulation of digits before routing is required.

pulse pkt3b (multifrequency pkt3b)
Pulse packet register signaling uses R1 frequencies with 50msec on/off periods. The packet that contains call category (signal number 13), called number and packet terminator (signal number 11) is sent in one package, after the request from the upper exchange. The correct reception of the packet is confirmed by the upper exchange. Since the called number is sent in a package with predefined timing periods, to route out a call from Pulse Pkt3b E1, accumulation of digits before routing is required. 

PX24M
Medium capacity Hybrid IP PBX designed and manufactured by Telesis A.S.

PX24N
A next-generation IP PBX to home and small business market. The PX24N is a complete solution in the same box, which also features an executive digital telephone offering advanced telephony tasks. Synonym: Telesis Nano, Nano. 

PX24U
Small capacity Hybrid IP PBX designed and manufactured by Telesis A.S.

PX24X
Large capacity Hybrid IP PBX designed and manufactured by Telesis A.S. 

 

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Q-q

 

QoS
Abbreviation for quality of service.

QSIG
Abbreviation for Q signaling. It is a CCS signaling for use in corporate or enterprise network.

 

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R-r

RAS
Abbreviation for registration, admission and status in H.225.0 protocol. RAS signaling is required when a H.323 atekeeper is present in the network.

RAS multicast port UDP
H.225 RAS (Registration, Admission, and Status) messages which are used between the H.323 endpoint and its Gatekeeper are typically carried out via UDP through port 1718.

RAS unicast port UDP
H.225 RAS (Registration, Admission, and Status) messages which are used between the H.323 endpoint and its Gatekeeper are typically carried out via UDP through port 1719.

RDTT
Abbreviation for ring down tie trunk.

RFC
Abbreviation for request for comments, an IETF publication. Before a document becomes an RFC, its draft is dicussed in working groups of IETF and then it is published as an RFC document.

roaming
The ability to use a mobile phone outside the usual service area.

route
The path that a message or call is to take in a communications network.

routing
The process of determining and prescribing the path or method to be used for establishing telephone connections or forwarding messages.

RTC
Abbreviation for real time clock.

RTCP
Abbreviation for Real Time Control Protocol.

RTP
Abbreviation for Real time Transport Protocol.

 

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S-s

 

SHA
Abbreviation for secure hash algorithm.

signaling interworking
The process of interconnecting two or more individual networks to facilitate communications among their respective nodes. Note: The interconnected networks may be different types. Each network is distinct, with its own addresses, internal protocols, access methods, and administration.

SIP
Abbreviation for session initiation protocol.

SIP registrar
It is a component in the SIP system which accepts SIP register requests from SIP users.

SL
Abbreviation for local  trunks in CIS signaling.

SLM
Abbreviation for toll switched trunks in CIS signaling.

sls
Abbreviation for signaling link selection in SS7 signaling.

SLTA
Abbreviation for signaling link test acknowledgment in SS7 signaling.

SLTM
Abbreviation for signaling link test message in SS7 signaling.

SP
Abbreviation for signaling point in SS7 signaling.

SPC
Abbreviation for stored programmed controlled.

SS7
A common-channel signaling system. Synonym: CCS7, SS#7, SS No.7

SSP
Abbreviation for service switching point in SS7 signaling.

STB
Abbreviation for serial telecom bus.

Stillink
The brand name used for VoIP gateway and signaling converters designed and manufactured by Telesis A.S. The name has been derived from words Still and link to indicate the purpose of the device in a network. Since signaling conversion and VoIP connectivity co-existed in the same system, Telesis A.S. calls Stillink devices as combined digital VoIP gateway and signaling converter systems.

Stillink 200
A Stillink system for low density requirements. It has two E1 interfaces and may provide up to 45 concurrent VoIP calls.

Stillink 800
A Stillink system for low density requirements. It has eight E1 interfaces and may provide up to 45 concurrent VoIP calls.

Stillink 3200
A Stillink system for high density requirements. It is 19 inch rack mountable and expandable modularly. Supports 32 E1 interfaces and 960 concurrent VoIP calls at its maximum capacity.

STP
Abbreviation for signal transfer point in SS7 signaling.

switching matrix
Software and processors in a telephony system, where switching of the calls occurs.

 

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T-t

T.30
An ITU-T recommendation. Procedures for document facsimile transmission in the general switched telephone network.

TCC
Abbreviation for to call control. Indication to call control from port control.

TCL
Abbreviation for toll connection line in CIS signaling.

TDM
Abbreviation for time division multiplexing.

TE
Abbreviation for terminal equipment.

Telesis A.S.
Telesis Telekomunikasyon Sistemleri San. ve Tic. A.S.

Telesis Nano
A next-generation IP PBX to home and small business market. The Telesis Nano is a complete solution in the same box, which also features an executive digital telephone offering advanced telephony tasks. Synonym: Nano, PX24N. 

TON
Abbreviation for type of number.

Tos
Abbreviation for type of service.

transceiver
A device that performs both transmitting and receiving functions.

 

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U-u

UDP
Abbreviation for User Datagram Protocol.

unicast
Unicast is the delivery of information to a single host.

UUS
ISDN supplementary service. User-to-user signaling.

 

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V-v

V5.2 protocol
It is a protocol stack, which is used for the connection of an Access Network (AN) to a Local Exchange (LE). It enables for various access methods, like analog telephone access and ISDN basic rate access.

V5.2 Interface
It is a bundle of E1 interface links in V5.2 prtocol. A V5.2 interface may use up to 16 E1 interface links. For analog access, the PSTN user port is converted into a functional part of the V5.2 protocol for signaling to the AN side. In principle, the V5.2 interface uses a concentrator type, whereby up to 16 E1 links, each carrying 30 channels (480 channels in all), may serve up to 1,920 subscribers with � concentration. There is no limit in principle, to the number of V5.2 interfaces that can exist between the access network and the local exchange. A channel is allocated to a subscriber dynamically when he or she makes or receives a call.

VAD
Abbreviation for voice activity detection.

VoIP
Abbreviation for voice over IP (internet protocol).

VoIP gateway
An interface between H.323, SIP etc. and other networks, including the PSTN.

 

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W-w

WDT
Abbreviation for watch dog timer.

WebPhone
A Telesis feature. Telesis WebPhone is a SIP softphone or client applet hosted in Telesis IP PBX, Telesis TDM - IP telephony systems, Stillink access gateways and Stillink signaling converters. The applet can be run from any Java enabled web browser. It can be used wherever is an access to the Internet. A web browser, a microphone, and a headset are sufficient to make calls.

Wi-Fi
A term to describe wireless local area network products that are based on the IEEE 802.11 standards.

WLAN
Abbreviation for wireless local area network.

WLL
Abbreviation for wireless local loop.

 

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X-x

X1
Large capacity telephony switch designed and manufactured by Telesis A.S.

XAP
Abbreviation for Xymphony Adjunct Protocol. When a call comes into a Telesis system or originates from a Telesis user, the Telesis system may ask to an adjunct server about how to proceed with this call attempt with using XAP. 

XDP
Abbreviation for Xymphony Discovery Protocol, which is a discovery protocol that has been integrated into Telesis PX24, X1 and Stillink systems. XDP allows system servicemen and administrators to quickly and easily locate Telesis IP systems in a network.

XCom
Abbreviation for Xymphony Companion, which is a freeware Xymphony-API client software developed by Telesis A.S. It is an advanced screen-based telephone dialer and console with numerous features to integrate the computer and Telesis system for telephony needs. It performs various telephony tasks such as dialing, call transfer, call park, call retrieve, conference, conversation recording, and display of port status.

XMan
Abbreviation for eXchange Manager for Telesis revision 4 systems. It is a freeware utility developed by Telesis A.S. Discountinued.

XPhone
Freeware VoIP softphone with the xSIP (eXtended SIP) protocol. Developed by Telesis A.S.

XPort
Freeware software for Telesis systems. Developed by Telesis A.S. It is used for collecting CMDR (call records), generating call reports, Man-Machine-Interfacing for the integrated signaling analyzer, archiving conversation records of auto recorded ports. Discountinued.

xSIP
Abbreviation for eXtended SIP. The protocol has been developed by Telesis A.S. The main purpose of its development is to make some value-added services in Telesis systems to be applicable for VoIP calls too.

XTools
Freeware software for Telesis systems. Developed by Telesis A.S. It is used for collecting CMDR (call records), generating call reports, Man-Machine-Interfacing for the integrated signaling analyzer, archiving conversation records of auto recorded ports. 

Xymphony
Operational software (firmware) for Telesis PX24 family of products, X1, and Stillink systems.

 

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Y-y

 

 

 

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Z-z

ZSL
Abbreviation for toll connecting trunks in CIS signaling.

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