Configuring Cas State Machines - AudioCodes Mediant 800 User Manual

CHAPTER 23 Digital PSTN

Configuring CAS State Machines

The CAS State Machine table lets you modify various timers and other basic parameters to define
the initialization of the CAS state machine without changing the state machine itself (no
compilation is required). The change doesn't affect the state machine itself, but rather the
configuration.
The CAS table used can be chosen in two ways (using the parameter CasChannelIndex):
■ Single CAS table per trunk
■ Different CAS table per group of B-channels in a trunk
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To modify the CAS state machine parameters:
1. Open the CAS State Machine page (Setup menu > Signaling & Media tab > Gateway folder
> Trunks & Groups > CAS State Machines).
2. Ensure that the trunk is inactive. The trunk number displayed in the 'Related Trunks' field must
be green. If it is red, indicating that the trunk is active, click the trunk number to open the Trunk
Settings page (see
then click Stop Trunk.
3. In the CAS State Machine table, modify the required parameters according to the table below.
4. Once you have completed the configuration, activate the trunk if required in the Trunk Settings
page, by clicking the trunk number in the 'Related Trunks' field, and in the Trunk Settings page,
select the required Trunk number icon, and then click Apply Trunk Settings.
5. Click Apply, and then reset the device.
CAS is applicable only to ISDN PRI interfaces.
Prior to configuring CAS, you must enable the CASOrientedBoard ini file parameter
(and reset the device with a save-to-flash for your settings to take effect).
Configuring Trunk
Mediant 800 Gateway & E-SBC | User's Manual
Settings), select the required Trunk number icon, and
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