DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects

3-1024TBRI-BD (TN2185 ISDN Trunk-Side BRI)

3
Figure 3-42. Integrated Trunk-Side BRI, ISDN Interface Reference PointsISDN 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 Termination1.
T 4-wire Basic Rate interface to a Network Termination.2
TE Terminal Equipment
U Basic Rate network-side 2-wire line interface.
1 TN2185 ISDN-BRI 4-Wire S Interface (Trunk Side)
2 TN2185 ISDN-BRI 4-Wire S Interface (Trunk Side)
3 2-Wire ISDN-BRI circuit pack

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
ISDNInterface Reference Points
1
2
3
4
5