more topics

Primary Rate Interface (PRI) and T1 Feature

Description

Type of Service

The system supports two types of service for DS1 facilities: T1 and PRI. The 100D, 100R INA, or 100DCD module can be programmed to operate in either type of service. T1 service transmits and receives voice and analog data, as well as digital data; PRI transmits and receives voice, analog, and digital data. Any combination of the following AT&T Switched Network (ASN) Services can be provided through a T1 or a PRI line/trunk:

• Megacom WATS service for domestic outgoing long-distance voice calls
  
  
• Megacom 800 service for domestic toll-free incoming voice calls
  
  
• Software-Defined Network (SDN) for voice and circuit-switched data calls
  
  
• MultiQuest® for 900 service numbers

PRI interacts with the ACCUNET Switched Digital Service for 56-kbps, 64-kbps restricted, and 64-kbps clear circuit-switched data calls. T1 supports ACCUNET Switched Digital Service or other circuit-switched data service at 56 kbps.

T1 and PRI support Shared Access for Switched Services (SASS), which allows both Megacom and Megacom 800 services to be offered over the same line. This eliminates the need to have separate incoming and outgoing lines/trunks when these services are chosen.

When PRI is selected as the type of service, any combination of the following MCI and local exchange carrier services are supported, in addition to the AT&T services supported in prior releases:

• MCI services include:
  
  
• MCI PRISM. For domestic outgoing long-distance and international voice calls; domestic outgoing 56-kbps restricted as well as 64-kbps restricted or unrestricted circuit-switched data calls.
  
  
• MCI 800. For domestic toll-free incoming voice calls.
  
  
• MCI Vnet. For domestic incoming and outgoing voice calls; or for outgoing 56-kbps restricted as well as 64-kbps restricted or unrestricted circuit-switched data calls.
  
  
• MCI 900. Providing 900 service numbers.
  
  
• The system supports the following local DMS-100 local exchange carrier services:
  
  
• Virtual Private Network (VPN). For calls between the MERLIN MAGIX Integrated System and another communications system (for example, another MERLIN MAGIX Integrated System).
  
  
• Maximal OUTWATS and INWATS. For domestic outgoing long-distance voice calls (not including support for bands or zone); for domestic toll-free incoming calls.
  
  
• Foreign Exchange. For local call rating of calls from the local exchange in the area served by the foreign exchange.
  
  
• Tie Trunk. For private exchange call rating of calls placed on a dedicated Central Office facility between the MERLIN MAGIX Integrated System and another MERLIN MAGIX Integrated System.
  
  
• Integrated Services Access (also called Call-by-Call Service selection). Allows a B-channel group to carry a variety of local services.

T1 is the factory setting and, when selected for the DS1 facility, allows each of the 24 channels to be programmed to emulate tie (emulated voice or Switched 56), loop-start, ground-start, or DID lines or to provide Switched 56 data-only service in any combination. A single 100D, 100R INA, or 100 DCD module, therefore, can take the place of 24 regular outside lines/trunks.

T1-emulated voice tie channels and T1-emulated data tie channels can be used to connect MERLIN MAGIX Integrated Systems with one another and/or with MERLIN LEGEND (Release 6.1 or later), DEFINITY ECS, DEFINITY BCS, or DEFINITY ProLogix Solutions systems in private networks. They act as tandem tie trunks. If the type of service desired is PRI, tandem PRI trunks can perform the same function. (See Tandem PRI Trunks.)

If common-channel signaling (CCS) is selected, 23 channels are available for emulation, and the twenty-fourth channel carries trunk supervision signals. (See Signaling Mode.)

Topics
	Description
	Called Party Nunber (CdPN) Calling Party Number (CPN) Lines / Trunks PRI T1 DS1 Facility Options Type of Service Framing Format Line Coding Channel Service Unit   Line Compensation Signaling Mode Tandem PRI Trunks Tandem PRI Trunk Programming PRI Programnming Options PRI Programnming Options - PRI Telephone Number PRI Programnming Options - Network Services Supported PRI Programnming Options - Copy Telephone Number to Send PRI Programnming Options - Telephone Number to Send PRI Programnming Options - Test Telephone Number   PRI Programnming Options - Timers and Counters PRI Programnming Options - Terminal Equipment Identifier (TEI) PRI Call Processing Incoming Calls Outgoing Calls Network Selection Table Call-by-Call Services Table Station Identification - Automatic Number Identification T1 Programming Options T1 Programming Options - T1 Tie Trunk Connections T1 Programming Options - T1 Routing by Dial Plan System-wide Programming Options - Clock Synchronization System-wide Programming Options - Clock Switching
	At a Glance
	Considerations & Constraints
	Incoming Calls Outgoing Calls
	System Programming
	Mode Differences
	Feature Interactions