AT&T MERLIN LEGEND Release 3.0 System Programming Manual page 409

DS1 Facilities
Facilities
DS1
Use the procedures in this section to program the following options for DS1
(digital signal level 1) facilities (T1 or PRI) connected to a 100D (DS1) module:
Type of DS1 facility
T1
ISDN (Integrated Services Digital Network) Primary Rate Interface
(PRI)
Frame Format
Zero Code Suppression
Signaling Mode
Line Compensation
Clock Synchronization
Channel Service Unit
Type of DS1 Facility
Use this procedure to specify the type of facility (T1 or PRI) connected to a
100D (DS1) module. If T1 type is programmed, and the channels are used for
emulation and/or AT&T Switched Network (ASN), you must specify the type of
channel emulation. If the type is T1 and the type of channel emulation is tie
trunk, you must specify the transmit/receive loss parameter settings are also
selected. The two valid settings are as follows:
TIE-PBX. Select when emulated tie trunks are used to connect to another
communications system (such as PBX or Centrex). The transmit/receive
parameter is set to 0/4.
Toll. Select when emulated tie trunks are used for ASN services (such as
Megacom
transmit/receive parameter is set to 0/6.
If you select T1, channels can emulate ground- or loop-start trunks, tie trunks, or
DID trunks in any combination. Note that unused channels must be specified as
unequipped.
If either T1 or PRI is selected, channels can be used for ASN services. When T1
channels are used for ASN services, each channel must be programmed for tie
trunk emulation.
If you select PRI, you must also perform additional procedures. At a minimum,
the Framing Mode and Zero Code Suppression procedures must be performed.
See "PRl Facilities" for more information.
®
, Megacom 800, or Software Defined Network). The
Programming Procedures
4–59