Configuring T1/E1 Los Threshold; Configuring E1/T1 Loopback Detection - Patton electronics SmartWare R.3.20 Software Configuration Manual

SmartWare Software Configuration Guide
Configuring T1/E1 LOS threshold
This command takes effect only if the T1/E1 port is configured for long-haul applications. It specifies the sen-
sitivity for Loss Of Signal threshold. A signal suffers more attenuation over long distances than over short dis-
tances. Therefore the LOS-Threshold must be set higher for longer transmission distances. This command has
a default value of -46dB what should be enough for distances up to 1600 m/5250 ft.
Mode: port e1t1 <slot> <port>
Step
[ name ] (prt-e1t1)[ slot/port ]#los-thresh-
1
old {-4dB | -6dB | -8dB ... -46dB | -
48dB}
Configuring E1/T1 Loopback detection
In T1 mode the E1/T1 interface module has the capability for autodetection of inband sent loopback codes.
Once a loopback-up code is detected, the module automatically enables the proper loopback function and dis-
ables it a soon as the corresponding loopback-down code appears. This feature is used by carrier equipment for
testing the line to the customer. It sends the loopback-up code to the customer device, then subsequently
starts, for example, a Pseudo Random Bit Sequence (PRBS) to determinate the quality of the connection.
Depending on the configured T1 framing, the right loopback code detection mode will be enabled as soon as
the command loop-back auto-detection will be executed. For framing type uses a different loop-
back code detection mechanism:
• ESF: The loopback codes are transmitted via the 4kBit/s EOC-Channel, that is part of the 8kBit/s F-Bit
Channel. The following codes are supported:
Line Loopback Activate
Line Loopback Deactivate
Payload Loopback Acti-
vate
Payload Loopback Deacti-
vate
Universal Loopback Deac-
tivate
Loopback Retention
• SF and Unframed: An inband loop code pattern is sent for at least 5 seconds in all 24 timeslots. The follow-
ing codes are supported:
Line Loopback Activate
Line Loopback Deactivate
T1/E1 port configuration task list
Command
Command
Command
15 • T1/E1 port configuration
Purpose
Specifies Loss Of Signal Threshold
Default: -46dB
Binary Code
0 000111 0
0 011100 0
0 001010 0
0 011001 0
0 010010 0
0 010101 0
Binary RepetitionCode
00001
001
.
183