Avaya Communication Manager Administrator's Manual page 1316

Screen Reference
Trunk Group
TTL Type
Specifies the type of terminating test line (TTL) selected for testing trunks. The TTL type determines
what ATMS tests can be completed and thus which threshold values need to be administered.
Valid entries
105-w-rl
105-wo-rl
high-lts
low-lts
100
102
The following table explains the differences between types of terminating test lines:
Type TTL
105-w-rl
105-wo-rl
high-level-tone
low-level-tone
100
102
The far-end server or switch containing the TTL may be any of the following:
•
System 85 R2 switch, equipped with the Maintenance/Test Board (TN771B)
•
System 75 R1V2 and beyond, all of which contain the circuitry required to perform the TTL
function
•
System 85 R2 switch, equipped with the Analog/Digital Facility Test Circuit (ADFTC, SN261)
•
DIMENSION FP8, equipped with the Analog Facility Test Circuit (AFTC, ZLC-12)
•
Central Office switches, equipped with various TTL equipment that provide 100, 102, or 105 test
line capabilities (56A)
Other vendors' switches may be supported if compatible test lines are provided by these switches.
1316
Usage
105 with return loss
105 without return loss
high-level tone source
low-level tone source
100 type
102 type
Description
Full range of 18 measurements
or some defaults for return loss
used (56A)
Cannot return default values
for far-end return loss
Sends a fixed sequence of
tones at 0 dBm
Sends a fixed sequence of
tones at -16dBm
Up to 5 measurements that
sends a 1004 Hz tone then a
quiet termination
One measurement that sends a
1004 Hz tone
Administrator's Guide for Avaya Communication Manager
Example
TN771B, ZLC12 and
SN261B circuit packs
and new 56A
mini-responder
Older 56A
mini-responder
ZLC12 and SN261B
circuit packs
SN261B circuit pack
November 2003