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The HP Community is where owners of HP products, like you, volunteer to help each other find solutions.
HP Recommended

We are currently starting to deploy VVX line of phones for hosted PBX (310, 410) and are seeing an issue with line sharing and these model of phones. When a user makes a call the line stays siezed after the user hangs up until it expires.

 

We have talked with Metaswitch and they have informed us that this is an issue with the phone itself. This is what I have recieved from our CSE.

 

"This is a behaviour we have seen from few vendors to do with shared line seize not being un-subscribed to after the handset has been put down. The only fool proof solution is to turn off shared line, but you will loose shared line functionality, so that's not really practical. 

The way shared line works is that the phone has to send line-seize SUBSCRIBEs asking for a call appearance when it wants one, which the CFS will grant. The problem here is that the phone is (for some reason) not sending an un-SUBSCRIBE (i.e. a SUBSCRIBE with expires: 0) for the call appearance when it goes back on hook, and so will still think the line is seized until the original subscription times out and CFS NOTIFYs the phone the line is again free (the 30s window). There's nothing we can do to change this behaviour - it is something the phone is doing wrong and Polycom will have to fix. "

 

I have confirmed that I do not see any type of an unsubscribe when I hang up. I would like to request that Polycom fix this issue with their phones.

2 REPLIES 2
HP Recommended

Hello Nitco,

welcome to the Polycom Community.

It is always useful to include the currently used software version as issues experienced may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes.

Therefore the Polycom VoIP FAQ contains this post here:

Question: How can I find out my SIP UC Software Version or the BootROM Version of my Phone?
Resolution: Please check here

 

In addition to the above you would need to raise a ticket via your Polycom reseller with Polycom support and provide the Software Version, Phone Logs and a Wireshark trace.


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

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN
HP Recommended

I was having issue trying to find that link to open a ticket so thank you for that.

 

Phone Models are VVX 310, 410 and 600, UC Software is 4.1.6.53374 and the BootROM is 5.1.6.4483

 

 

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