Avaya S8700 Maintenance Manual page 381

TBRI-PT (ISDN Trunk-Side BRI Port)
CO
NT2
S/T
TE
Figure 8-48. Integrated Trunk-Side BRI, ISDN Interface Reference points
ISDN Interface Reference Point definitions:
LT Logical Terminal
V Primary Rate user/network (asymmetrical) trunk interface. The ECS is
capable of acting as the user or as the network side of this 1.544- or
2.048-Mbps interface.
R Interface between Terminal Equipment and Network Termination
S Basic Rate network-side 4-wire line interface
S/T 4-wire Basic Rate connection to a Network Termination
T 4-wire Basic Rate interface to a Network Termination.
TE Terminal Equipment
555-233-142
V
PRI
U
T
LT NT1
NT NT
2-Wire 4-Wire
U
NT
2-Wire
NT1
T
NT
2-Wire
ISDN Interface Reference Points
S
PBX
NT2
4-Wire
1
S
NT2
4-Wire
2
TE
3
U
LT
4
NT
2-Wire
LT NT2
S/T
TE TE
5
PBX
2
Issue 1 May 2002
TE
R
Terminal
Adapter
T
NT1
NT
4-Wire
cydfisdn RPY 072397
1
.
8-1077