Avaya 03-300430 User Manual

The TN726 Data Line circuit pack has eight ports, each of which supports an RS-232 interface 
to asynchronous CPE (customer-premises equipment). Each of these ports and the equipment 
connected to it constitute a data line. For DT-LN-BD (Data Line circuit pack) errors, see 

on page 2539. Check circuit pack-level errors first 

since the usability of the ports depend on the health of the circuit pack.
Use add data-module to administer data line ports at the terminal. The data module type is 

data-line. The list data-module command shows every administered data module in the 

system.
The TN750 Announcement circuit pack has one data line-type port on it. This data line port is 
used for saving and restoring announcements. This data line port is not supported on the S8500 
and S8700 media server products. For a description of and repair instructions for the TN750, 
see 

on page 403.

Note:

If the tests for the data line port in question pass, and user-reported complaints 
persist, there is probably an external problem. Test the ADU (asynchronous data 
unit), using the procedures in 

. If the ADU appears to be working properly, check the external 

wiring, then check the equipment.

DAT-LINE

MIN

test port location l

Data Line port

DAT-LINE

WRN

test port location l

Data Line port

)

0

Any

Any

Any

test port location sh r 1

1

Digital 

Looparound test 

(#171)

MIN

ON

test port location s r 2

 1 of 2