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Silent Ringing on VVX310 when Call Groups and BLFs are used

Occasional Visitor

Silent Ringing on VVX310 when Call Groups and BLFs are used

Hello All,


I believe I have stumbled across a bug and can't find any answers online or within the community.


Running a VVX 310 on 5.2.0 firmware, I have buttons monitoring other extensions using BLF, all connected to an Asterisk 1.8 server.


Attendant Calls Ring Type is set to silent (expected)


However, when a call designated for the group goes to my phone, AND phones being monitored via BLF, my phone rings silent if I get ringing notify sent to the phone for one of the BLF's before my own phone rings.


So to recap the conditions:


>Calling my extension (222) results in my phone ringing normally.

>Calling a BLF monitored extension such as 221 causes the BLF to light up normally (and silent)


Calling a group that simultaneously rings both the extensions above will cause my phone to ring silent. (both primary line and BLF lines light up, but the phone is silent)


This is causing a number of difficulties for customers we have deployed who have a receptionist who receives calls and has BLF's configured and is reproducible every time.


The only two workarounds are to ensure the primary phone (in my case, 222) rings first in a group before BLF monitored phones ring, OR, enable attendant ring tone, which is a huge distraction.


Would welcome any advice.


For those who would like to see SIP traces, if this:


NOTIFY sip:222@***** SIP/2.0
Via: SIP/2.0/UDP *****:5060;branch=z9hG4bK295472ca;rport
Max-Forwards: 70
From: <sip:221@*****>;tag=as13169120
To: "222" <sip:222@*****>;tag=6757BC0C-F3380729
Contact: <sip:221@*****:5060>
Call-ID: bc424684-541555d1-9da14670@*****
CSeq: 109 NOTIFY
User-Agent: *****
Subscription-State: active
Event: dialog
Content-Type: application/dialog-info+xml
Content-Length: 229

<?xml version="1.0"?>
<dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="7" state="full" entity="sip:221@*****">
<dialog id="221" direction="recipient">



Is sent before this:




INVITE sip:222@***** SIP/2.0
Via: SIP/2.0/UDP *****:5060;branch=z9hG4bK269f2259;rport
Max-Forwards: 70
From: "unknown" <sip:*****@*****>;tag=as0aab7bff
To: <sip:222@*****>
Contact: <sip:*****@*****:5060>
Call-ID: 74d4f570243589cd1454d40f39567d8e@*****:5060
CSeq: 102 INVITE
User-Agent: *****
Date: Tue, 24 Feb 2015 00:02:37 GMT
Supported: replaces, timer
Remote-Party-ID: "unknown" <sip:*****@*****>;party=calling;privacy=off;screen=no
Content-Type: application/sdp
Content-Length: 312




Extension 221 will have an audible ring, but extension 222 will ring silently.


Hope someone can help!





Message 1 of 2
Polycom Employee & Community Manager

Re: Silent Ringing on VVX310 when Call Groups and BLFs are used

Hello Luke,

welcome to the Polycom Community.

I believe this has already been discussed within the community in a different post but it is a known issue to be addressed in the next UC Software 5.2.2 and 5.3.0 and all later Versions.


Please check future release notes for VOIP-95424 and I am unable to provide an ETA for the release of the above.


If this is urgent please open a Polycom support Ticket via your Polycom reseller so we can check if we can provide a hotpatch.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

Polycom Global Services

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 2