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  

Call Routing

Telesis Systems Offering Advanced Call Routing

  • Telesis Business Phone Systems:
    • PX24N (Telesis Nano) IP PBX SoHo System
    • PX24M Hybrid IP PBX Business Phone System
    • 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
  • Large Capacity IP PBX for Enterprises:
    • Stillink 3200

Routing Capabilities

The advanced routing algorithm within the Telesis system is carried out in four steps:
1. First Step: Incoming A-Party Analysis
2. Second Step: B-Party (called-party) Pre-Analysis
3. Third Step: B-Party (called-party) Main Analysis
4. Fourth Step: Outgoing A-Party Analysis

The same routing algorithm is applied for both TDM and VoIP calls.

Incoming A-Party Analysis (optional)

Incoming A-Party (calling-party) analysis is the first (optional) step in Routing Analysis. It is applied to each originating or incoming interface. In order to facilitate this analysis, an incoming A-party analysis table is assigned to the originating user (TDM or VoIP). The incoming A-party analysis is done by analyzing the calling-party`s Number (up to 32 digits), Category, Nature of Address (or type of number), Numbering Plan, Presentation Status, Screening Status, etc. after which any or all of these parameters may be translated and then selected for a called-party pre-analysis table.

Called-Party Pre-Analysis (optional)

The Pre-Analysis is carried out prior to the main called-party analysis to truncate some called-party prefixes or reject certain addresses (destinations) altogether. Telesis has developed pre-analysis in order to simplfy the main analysis, especially for when a Telesis system services several operators in transit mode. Pre-analysis is applied to as many as 16-digit called-party prefixes.

Main Analysis

The main called-party analysis is carried out on the called-party prefixes resulting from the pre-analysis. Up to 16-digit-long prefixes may be analyzed. It is possible to define the minimum and maximum digits for starting the analysis. This analysis is date- and time-dependent, i.e., for different days of the week  and different times of the day, the analysis may result in different outcomes:
1. Route
2. Called-party number replacement (up to 32 digits)
3. Call class to be used for detailed CMDR
4. Authorization level necessary to realize the routing
5. Tariff

The route that is decided on after this analysis may be:
1. A local termination (i.e., subscriber)
2. A trunk group from which the call is to be routed outward
3. A physical address of a digital/analog subscriber/trunk port available in the switch
4. A subscriber service
5. A system service for maintenance and administrative purposes
6. A system resource like integrated voice mail, message-storage hardware etc.
7. A tone or a system message stored in the switch

Outgoing A-Party Analysis (optional)

Outgoing A-party (calling-party) analysis is the last (optional) step in the routing procedure. It is applied to the terminating or outgoing interface. In order to facilitate this analysis, an outgoing A-party analysis table is assigned to the called subscriber/outgoing trunk. The outgoing A-party analysis is done by analyzing the calling party`s number (up to 32 digits), Category, Nature of address, Numbering Plan, Presentation Status, Screening Status, etc. and, additionally, the Called-Party`s Nature of Address, after which any or all of these parameters may be translated.

 

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