Fxo Card Loopbacks - Zhone IMACS 8000 User Manual

Running Head
FXO Card User Screens and Settings
busy. If a call is in progress when the CGA alarm is received, the system will hold the call for
two seconds, drop it and then busy out the port to the attached PBX for the duration of the
alarm. Once the alarm clears, the system will automatically place the port back in idle mode
thereby making it available to the attached PBX.
LB
The Loopback field lets you loop the port back toward the network and far end. The dgtl
(digital) loopback sends the incoming digital DS0 signal back to the far end without decoding
it. The anlg (analog) loopback sends the decoded analog signal back to the far end after
decoding and then re-encoding it. Figure 13-3 shows the loopback options, which allow you
to test and troubleshoot the FXS card. To disable a loopback, set this field to off.
PATTRN
The Pattern setting sets the outgoing test pattern for this analog port. The pattern, generated
by the system, is sent only to the currently selected port. The none option disables sending a
test pattern. The D-mW (Digital milliwatt) option sends a 1 kHz tone at 0.0 dBm. The Rx TLP
setting affects the D-mW signal level. The quiet option places a termination on the line so that
no analog signal is sent.
13-8
FXO Card
Codec
Analog Digital
Loopback Loopback
Digital-to-Analog
Convertor
Figure 13-3.FXO Card Loopbacks
PCM Bus
T1/E1
DS-0
Model No.
FXO Card
Network
Voice Cards