DEFINITY Enterprise Communications Server Release 6
Maintenance for R6vs/si
555-230-127 Issue 1
August 1997
Maintenance Object Repair Procedures

Page10-1282TBRI-PT (TN2185 ISDN Trunk-Side BRI Port)

10

Figure 10-92. 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 n etwork 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 Termination1.

T 4-wire Basic Rate interface to a Network Termination.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
cydfisdnRPY 072397
NT2 LT
LT
NT2
NT2
Termi nal
Adapter
NT2
S/T
TE
TE
NT1
VPRI
U
U
T
S/T
T
S
S
UT
R
NT1
NT1
ISDN Interface Reference Points
1
2
3
4
5