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VoIP - Caller Display

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By default we send the incoming caller's phone number when you receive a call. This means that your phone (if it has a display) will show the number of the person calling you. It may show Unknown or Withheld if it is not known.


Tag feature

This is a feature found on the control pages for your phone number.

The Tag is 4 characters that will be prefixed to the number and shown on your phone's display, this can be used to help identify the number the caller called. E.g., the tag could be set to Sale or Tech, and then you'll know what type of call you are receiving.

The tag is set to 'aTag'
The tag is set to 'aTag'


The above screenshots are from a Snom 715 and a Snom 821 showing incoming calls with a tag of "aTag".

The SIP for a tag is shown in the From field:

From: "aTag07508xxxxxx" <sip:07508xxxxxx@voiceless.aa.net.uk>;tag=2015012110443100001

Special, "unsupported" tag feature: If you forward a VoIP number to another number such as your mobile (using the Also Rings), the CLI presented to your mobile will be the callers number. You won't know if this is a redirected call or not. There is a hidden feature where by we can add a prefix to the CLI.

In the 'tag' box, set it to N= (eg 2=), then the CLI will be sent as +112 followed by the number calling. This way you will be able to tell that the incoming call is one being redirected from your VoIP number and you still get the CLI of the caller.

(This feature was added 2017-04-20, but may be removed or improved)

Setting your outgoing caller ID

see: VoIP Caller ID