Avaya 03-300430 User Manual

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)

0 (

0

Any

Any

Any

test port location sh r 1

1 (

Level 1 Status test (#1242)

MIN

OFF

129 (

)

257(

 

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