Chapter 4. Status

Table 4-1. LA and LB Leads

LA

LB

Condition

 

 

 

Off

Off

No test (normal)

 

 

 

On

Off

Local line loopback

 

 

 

Off

On

Remote line loopback

 

 

 

On

On

Local DTE loopback

 

 

 

V.35 Interface Leads

RS:

Request to send

CS:

Clear to send

CD:

Carrier detect

TR:

Data terminal ready

SR:

Data set ready

LL:Local DTE port loopback

RL:

Remote port payload loopback

TM:

Test mode. Asserted by the T3SU 300 when either the

 

network or the port is being tested.

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ADTRAN T3SU 300 user manual LA and LB Leads Condition, Interface Leads