Avaya 03-300430 User Manual

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Communication Manager Maintenance-Object Repair Procedures
1588 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
 
Figure 89: Integrated Trunk-Side BRI, ISDN Interface Reference Points
Table 587: ISDN Interface Reference Point definitions 
LT
Logical Terminal
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
1
.
4-wire Basic Rate interface to a Network Termination.
2
TE
Terminal Equipment
 1 of 2
CO
NT
2-Wire
NT
2-Wire
NT
2-Wire
NT
4-Wire
4-Wire
4-Wire
NT
2-Wire
NT
4-Wire
PBX
PBX
LT
TE
TE
TE
cydfisdn RPY 072397
NT2
LT
LT
NT2
NT2
Terminal
Adapter
NT2
S/T
TE
TE
NT1
V
PRI
U
U
T
S/T
T
S
S
U
T
R
NT1
NT1
ISDN Interface Reference Points
1
2
3
4
5