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If you use more than one switch in your configuration of the AE Services implementation for Communications Server, and all the switches have common dial plan settings, you can use the Default Dial Settings page as a template.
When you add a switch connection for AE Services implementation for Microsoft LCS, the dial plan settings that you have administered on the Default Dial Plan settings page are applied to that switch connection.
When switches are networked together using ISDN QSIG tie trunks or ISDN tie trunks, in some call scenarios Communication Manager sends extension numbers from the networked switch to the AE Services Server. The format of these extension numbers may be different than the format of local extension numbers.
To optimize the experience of Microsoft Office Communicator users, be sure to administer To TelURI rules for the networked switch, or switches, as well as the local switch. Additionally, if the networked switch has a different extension length than the local switch, extensions might be reported with both the local extension length and the networked extension length. Be sure to administer To TelURI rules that can successfully convert both extension lengths for the networked switch.
Also, you might need multiple entries in the To TelURI rules for the networked switch if that switch has a different extension length than the local switch.