Lucent Technologies 5 manual Issue

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MERLIN LEGEND Communications System Release 5.0

Issue 1

System Manager’s Guide 555-650-118

June 1997

 

 

3System Components

Control Unit

Page 3-9

T1 Service. This service is cost-effective and convenient for many businesses. Prior to Release 4.0, it provided voice operation only. In Release 4.0 and later systems, T1 service provides voice operation or high-speed data operation. A T1 channel must be programmed for either voice or data operation and cannot be used for both.

Voice Operation. T1 voice channels can be configured to emulate different types of trunks for voice (analog) use, according to business needs. T1 can emulate loop-start, ground-start, Direct Inward Dial (DID, Hybrid/PBX mode only), and tie trunks. In some areas, T1 service is less expensive than leasing the equivalent number of standard telephone company trunks. T1 also allows access to network subscriber options such as toll-free domestic long-distance services.

You can connect the system’s control unit to another system’s control unit using an emulated T1 tie trunk programmed for T1-type voice operation. This arrangement provides voice communications or analog data communications using modems.

Data Operation. Available in Release 4.0 and later systems, T1 Switched 56 data operation allows switched data communications at 56 kilobits per second. The same high-speed connectivity can link a MERLIN LEGEND Communications System to another; or it can link a MERLIN LEGEND Communications System to a DEFINITY system. Whether used for digital tie-trunk emulation or not, a T1 data-operation channel provides data communications only, not voice communications.

Page 76
Image 76
Lucent Technologies 5 manual Issue