AT&T MERLIN LEGEND Installation & Maintenance Manual page 85

System Description
clock synchronization
signaling mode (for T1 service only)
The appropriate setting for each option is determined by the
transmission facility to which the module is connected. Each
option is discussed below.
Type of Service
The system supports two types of service for DS1 facilities: T1
and ISDN-PRI. The 100D module can be programmed to operate
in either type of service. T1 service transmits and receives voice
and analog data; ISDN-PRI transmits and receives voice and
analog and digital data.
The following AT&T Switched Network (ASN) services are
provided through a T1 or ISDN-PRI line/trunk:
Megacom WATS service for domestic long-distance outward
voice calls; ISDN-PRI does not support international dialing
for Megacom WATS service.
Megacom 800 service for domestic toll-free incoming voice
calls. T1 service supports Megacom 800 with or without
Dialed Number Identification Service (DNIS), while ISDN-PRI
supports it only without DNIS. Also, ISDN-PRI does not
support international dialing for Megacom 800 service.
Software Defined Network (SDN) for voice and circuit-
switched data calls (up to 56 kbps). SDN lets businesses use
portions of the ASN in concert with their dedicated private line
networks. However, the system does not support "uniform
dialing plan," which is necessary for complete integration with
SDN. Also, ISDN-PRI service does not support international
dialing for SDN.
MultiQuest® service for domestic toll incoming voice calls
(900 number). T1 supports MultiQuest service with or without
DNIS, while ISDN-PRI supports it only without DNIS.
DS1 Capabilities
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