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Communication Manager Maintenance-Object Repair Procedures
2202 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Figure notes:ISDN Interface Reference Point definitions
Hardware Error Log Entries and Test to Clear Values
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 NT2 Termination
1
.
1. Network Termination 2 (NT2), that terminates Layer 1 and higher layers. PBXs, LANs, and terminal
controllers typically provide NT2 functionality including protocol handling and multiplexing for Layers 2
and 3.
T 4-wire Basic Rate interface to a NT1 Termination.
2
2. Network Termination 1 (NT1), that terminates Layer 1 and monitors maintenance, performance, timing,
power transfer, multiplexing, and multi-drop termination with contention resolution.
TE Terminal Equipment
U Basic Rate network-side 2-wire line interface.
1 TN556B ISDN-BRI 4-Wire S/T-NT Line (A-law)
2 TN2185 ISDN-BRI 4-Wire S Interface (Trunk Side)
3 TN2198 ISDN-BRI 2-Wire U Interface
5 TN2185 ISDN-BRI 4-Wire S Interface (Trunk Side)
Table 785: TBRI-PT Error Log Entries
Error
Type
Aux
Data
Associated Test Alarm
Level
On/Off
Board
Test to Clear Value
0 (a
) 0 Any Any Any test port location sh r 1
1 (b
) Level 1 Status test (#1242) MIN OFF
129 (c
)
257(d
)
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