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How do I configure Cisco Call Manager SIP trunk with Adtran SIP header manipulation?

Trunking between a Cisco PBX and GoTo Connect allows phones that are still behind a Cisco call manager to use their existing functionality, while adding some additional cross-platform functionalities with GoTo Connect phones.

To learn how to configure a Cisco Call Manager SIP trunk, please check out our article in the Customer Center (login required) for help.