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VoIP - Caller Display: Difference between revisions
SIN 227 doesn't allow '+' in the number field. Wish I'd known this before trying to work out why it didn't appear...
(Caller info obtained from SIP URIs may not be just numeric) Tags: Mobile edit Mobile web edit |
(SIN 227 doesn't allow '+' in the number field. Wish I'd known this before trying to work out why it didn't appear...) |
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__NOTOC__<indicator name="Configuring">[[File:Menu-cog.svg|link=:Category:VoIP Features|30px|Back up to the VoIP Features Category]]</indicator>
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. There is also a caller's name field which we send as well, although this usually won't show the name (except on calls from other AAISP VoIP customers).
Where an incoming call has been made using a [[VoIP_-_Calling_With_a_SIP_URI|SIP URI]] rather than the PSTN the 'number' of the person calling cannot be trusted (and may be not purely numeric) , and so we prefix that 'number' with a '?' to indicate the potential untrustworthyness.
==Caller's Number and Name==
The protocol used (SIP) to deliver phone calls to you has fields which provide the caller's number and the caller's "name" - although the name will probably not be received for calls from the PSTN. Where the name field received is the same as the number field, we will send to you the name field set to the "pretty format" of the caller's number - e.g. "020 xxxx xxxx", "07973 xxxxxx". If the name field is set to something different than the number then it will be passed on to you - in general this will only apply to calls from other AAISP VoIP customers, or from calls received using sip: URIs.
Your local hardware will display either the number, the name, or both (or neither if it has no display...). If you have an Analogue Telephone Adaptor set to sending caller display to your analogue phone(s) using BT's SIN 227 standard, then this standard also has fields for caller's number and caller's name and those fields will be populated. Note that in the SIN 227 standard '+' is not a valid character in the number field, although space (' ') and dash ('-') are allowed.
For some examples, a SIP From header could be:
"07973 xxxxxx" <sip:07973xxxxxx@voiceless.aa.net.uk>;tag=2018122611233000003
becoming (through a Grandstream ATA) the SIN 227 message:
NMBR = 07973xxxxxx DATE = 1226 TIME = 1123 NAME = 07973 xxxxxx
An anonymous call would have a SIP From header like:
"Anonymous" <sip:Anonymous@voiceless.aa.net.uk>;tag=2018122611244000001
becoming
NMBR = O DATE = 1226 TIME = 1124 NAME = Anonymous
and a SIP URI call could have a SIP From header of:
"30164xxx" <sip:%3f30164xxx@voiceless.aa.net.uk>;tag=2018122611314200003
becoming
NMBR = O DATE = 1226 TIME = 1131 NAME = 30164xxx
(The '%3f' is the URL encoding of the '?' we added)
(In the SIN 227 messages, a NMBR of 'O' means 'Unavailable' and 'P' means 'Withheld').
==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
[[File:Snom715-Tag-Screenshot.png|none|frame|The tag is set to 'aTag']]
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