I have a UC520 with four analog trunk ports. I would like for all outgoing calls to show the main office number as the callerID. Reasoning is that we have four lines and four numbers but clients always call the main number and the telco rolls the incoming calls to the other lines if busy. Hence when we call out I want all outbound to show the main number and not the actualy telephone number of that trunk.
For analog lines you cannot control the caller-id via the UC520. You will need to contact your telco provider and explain what you want. It is a very common request and telco should have no problem setting up all four lines to use the main number as the caller-id.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
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Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
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CUCM Database Replication is an area in which Cisco customers and
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