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BLF is not working if SIP Autenthication is enabled

Occasional Contributor

BLF is not working if SIP Autenthication is enabled

Hi all, 


We have enabled Sip Autenthication on some Polycom SoundPoint IP 650.


Registering and calls are working fine, but BLF functionability disappears in the phone, altought SIP messages seems to be ok (REGISTER, SUBSCRIBE, 200 OK...)



Sip Software Version:

BootROM Software Version:



Is it a known bug?


Any way to fix  it without upgrading? Upgrading would make it works?



Thanks a lot for the help




Message 1 of 2
Polycom Employee & Community Manager

Re: BLF is not working if SIP Autenthication is enabled


welcome to the Polycom Community.

The software you are utilizing is no longer supported.


I can only ask you to upgrade to UC Software 4.0.11 and then test again.


Any questions regarding upgrades are answered in the FAQ.

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

Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

The above is necessary in order to track issue internally within Polycom.

You are welcome to post more questions or configuration or logs for other community members to look at but if your issue requires a fix via Polycom you must go via the official support structure.

Please ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

Please remember, if you see a post that helped you , and it answers your question, please mark it as an "Accept as Solution".

This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
Polycom employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.
Message 2 of 2