Version 7.2 507 Mediant 800B Gateway & E-SBC
User's Manual 22. Digital PSTN
The following is an example of the message flow for interworking private wire Hook Switch
states between the private wire trunk and the E1/T1 CAS trunk:
Figure 22-7: Message Flow for Private Wire Setup with Hook Signaling
Note: The feature is supported for IP-to-Tel calls.
To configure private wire interworking:
1. Enable TDM tunneling for private wire services, by doing one of the following:
• Globally: Open the Digital Gateway Parameters page (Setup menu > Signaling
& Media tab > Gateway folder > Digital Gateway > Digital Gateway
Parameters), and then from the 'TDM Tunneling' drop-down list, select Private
Wire:
Figure 22-8: Enabling Private Wire Services
• Per Trunk: Configure the ini file parameter EnableTDMOverIPforTrunk.
2. Configure the ini file parameter EnableReansweringInfo to 1.
3. Load a CAS table file that supports your private wire service. For loading files to the
device, see Loading Auxiliary Files on page 831.
4. In the Trunk Settings page (see Configuring Trunk Settings on page 493), configure
your E1 or T1 CAS Trunk. Make sure that you select the CAS table file that you
loaded in the previous step, in the 'CAS Table per Trunk' field:
Figure 22-9: Selecting CAS File for Trunk - Private Wire
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