CAS Single-bit E&M Emulation

Telesis Systems Offering CAS Single-bit Signaling

• Telesis Business Phone Systems:
  • PX24X Hybrid IP PBX Business Phone System
• Telesis Switching Systems:
  • X1 Large Capacity TDM - IP Telephony Switch
• Combined VoIP Gateway and Signaling Converters:
  • Stillink 200
  • Stillink 800
  • Stillink 3200

Types

Telesis systems support single-bit CAS (Channel Associated Signaling) E&M emulation with:

• Immediate-start continuous line / pulsed address signaling
• Wink-start continuous line / pulsed address signaling
• Immediate-start continuous line / DTMF address signaling
• Wink-start continuous line / DTMF address signaling
• Immediate-start continuous line / MFCR2 interregister signaling
• Wink-start continuous line / MFCR2 interregister signaling
• Immediate-start continuous line / MFR1 interregister signaling
• Wink-start continuous line / MFR1 interregister signaling
• Pulsed line / pulsed address signaling

Telesis systems have CAS signaling E1 interfaces to connect to PSTN and private network

Options

The physical interface for CAS single-bit E&M emulation is an E1. 120 ohm balanced terminations are supported on any E1. The line code is HDB3 or AMI programmable. CRC4 may be enabled or disabled. Each E1 channel can be programmed as incoming, outgoing, bothway trunk, or unavailable. This also yields fractional E1 connections.

For single-bit pulsed or continuous line signaling, the idle states of the A,B,C, and D bits can be set as desired. The signaling bit is also programmable as any one of A,B,C, or D. The transmit and receive gains in any E1 voice channel may be increased or decreased.

Many signaling periods and timers for signal generation and detection are field programmable, such as:

• Timer to receive the first digit
• Interdigit timer
• Release timer
• Disconnect timer
• Seizure-acknowledge timer
• Seizure-pulse duration
• Seizure-acknowledge pulse duration
• EOS (End of Selection) pulse duration
• Answer-pulse duration
• Clear-pulse duration
• Charge-pulse duration
• Make/break ratio and periods for pulse dialing
• Wink-pulse duration

Both unilateral and bilateral call clearing are applicable.

Route, Routeset Configuration, Routing

In a Telesis system, each E1 channel may have its own route number. It is possible to define up to 128 distinct routes. A given route to a particular destination and its accompanying routes are grouped in a routeset. Each route in a routeset has a priority order. Routing to the next priority alternate route is possible in the event that a route becomes unavailable. The Telesis system realizes routing according to the dialed digits.

Related Readings

We recommend you to visit Telesis WiKi Pages for technical readings.