The Distinctive Ringtone about W52P
Last modified date: 2017/12/05 views: 1691
Description

We have a customer that has multiple W52 handsets and wants distinctive ring since they have no way of knowing if the call is from another extension or is an external one.

We see in the handset you can change the ring tone of the account or intercom but they are not using the internal intercom feature they dial an extension number which the handset then sees as an external call not internal.

Cause

There is no Ringtone page in the web UI like other models.

More Information

W52P support the distinctive ring not the same as other models, it will play the corresponding ringtone only when the Invite message include the Alert info header and the header must be like this:

Alert-Info: Bellcore-dr2( the B must be capital , don’t change any syntax include the capital ) , in this header , you can only change the number which means the ringtone stored in the phone itself, for example in you configure it with Alert-Info: Bellcore-dr2 , means the second ringtone in the phone.


It needs the support of the server; the server send the Alert-Info message for the internal call, the phone can play the corresponding ringtone, so the customer can distinguish whether the incoming call is internal call or external call.

The message content of the Invite message like below:

INVITE sip:260@192.168.20.34:5062 SIP/2.0

Via: SIP/2.0/UDP 192.168.20.5:5060;branch=z9hG4bK-d8754z-3a4fbc21e15f0c3c-1---d8754z-;rport

Max-Forwards: 70

Contact: <sip:254@192.168.20.5:5060>

To: <sip:260@192.168.20.5>

From: "Yealink T46 EXP 40 Pi"<sip:254@192.168.20.5:5060>;tag=cc6b684a

Call-ID: ODM4ZDM4MmVmOWVmYzVhZmFjMDIzZmUxMGM4ZmFkMGI.

CSeq: 1 INVITE

Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REGISTER, SUBSCRIBE, NOTIFY, REFER, INFO, MESSAGE

Content-Type: application/sdp

Supported: replaces

Alert-Info: Bellcore-dr5

 

Content-Length: 332

 

v=0

o=3cxPS 22078816256 451441328129 IN IP4 192.168.20.5

s=3cxPS Audio call

c=IN IP4 192.168.20.31

t=0 0

m=audio 11796 RTP/AVP 0 8 9 18 101

a=rtpmap:0 PCMU/8000

a=rtpmap:8 PCMA/8000

a=rtpmap:9 G722/8000

a=rtpmap:18 G729/8000

a=fmtp:18 annexb=no

a=fmtp:101 0-15

a=rtpmap:101 telephone-event/8000

a=ptime:20

a=sendrecv

Product Type
W52P
Version
All version
200/200
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