E&M Card Loopbacks - Zhone IMACS 8000 User Manual

E&M Card
In most cases, you should set this parameter to busy. If a call is in progress when the CGA
alarm is received, the system holds the call for two seconds, drops it, and then busies out the
port to the attached PBX for the duration of the alarm. Once the alarm clears, the system
automatically places the port back in the idle mode, thereby making it available to the attached
PBX.
LB
The LB setting allows you to loop a port back toward the network and far end for testing and
troubleshooting. Figure 11-3 shows the available loopbacks. The dgtl (digital) loopback sends
the incoming digital signal from the network back toward the far end, without decoding it. The
anlg (analog) loopback sends the decoded analog signal back to the far end. To disable either
loopback after testing, set this field to off.
PATTRN
The Pattern is the outgoing test pattern to be sent to the selected port by the system. You can
send a different pattern to each port. The none setting disables the test pattern. The D-mW
(Digital milliwatt) option sends a 1 kHz tone at 0.0 dBm. The setting of the Rx TLP field
adjusts the D-mW signal level before sending the signal to the CPE. The quiet option places
a 600-ohm termination on the line so that no analog signal is sent (idle mode).
Voice Cards
E&M Card
Codec
Analog Digital
Loopback Loopback
Digital-to-Analog
Convertor
Figure 11-3.E&M Card Loopbacks
E&M Card User Screens and Settings
PCM Bus
T1/E1
DS-0
Network
11-9