Instruction manual

Features
Both ends of the DS1 facility must be able to communicate. To ensure this, the
following options are set during system programming to match the transmission
of the outside DS1 facility:
■ Type of service (T1 or PRI)
■ Framing format
■ Line coding
■ Type of equipment (CSU)
■ Line compensation
■ 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.
Type of Service
The system supports two types of service for DS1 facilities: T1 and PRI. The
100D module can be programmed to operate in either type of service. T1
service transmits and receives voice and analog 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.
PRI supports 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 trunks.
T1 is the factory setting and, when selected for the DS1 facility, allows each of
the 24 channels to be programmed to emulate tie, loop-start, or ground-start
lines in any combination. Therefore, a single 100D module can take the place
of 24 regular outside lines.
If common-channel signaling (CCS) is selected, 23 channels are available for
emulation, and the 24th channel carries formatting signals. (See Signaling
Mode later in this section.)
Primary Rate Interface (PRI) 353