Installation guide

Synapse Installation Guide Back to Contents
System Configuration 90
Line Calibration Configuration
If your system uses Centrex lines, you must enter an outbound line prefix or code in order
for line calibration to take place. You should perform this procedure before connecting
the lines to the PSTN Gateway. Consult your Centrex line provider for the correct code
to enter.
To enter Centrex line access codes:
1. In the navigation menu at left, click Device Management, then Device Log.
2. Select the PSTN Gateway from the Device Log drop-down list. Line Calibration
Data and Line Calibration Configuration appear.
3. Enter the Line Access Code for each line. Do not enter a code for a line that has been
selected for Door Phone Mode.
4. Click Save Configuration.
You can now connect the physical lines to the PSTN Gateway.
Centrex lines operate in Line Appearance mode only.
The Door Phone Mode column is used for selecting a line for a Trunk Port (FXO)
door phone. See “Configuring a Trunk Port (FXO) Door Phone” on page 85.