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SoundStructure C16 Line register issue

Occasional Visitor

SoundStructure C16 Line register issue



We have a SoundStructure C16 interface with Cisco Unified Communications Manager. Cisco have 2 server to provide Server Redundancy function.


If we input both server IP address at C16 line setting page Server 1 and Server 2, then C16 cannot register the line at Cisco.

If either one of the Cisco server down, C16 success to register the line at Cisco. 

If either one of the Cisco Server IP address input at the line setting page, C16 success to reigister the line at Cisco.


Seems like C16 cannot interface with Cisco which provide Server Redundancy function.


Anything we have missed to set in C16, so that we have the above problem?





Message 1 of 2
Polycom Employee & Community Manager

Re: SoundStructure C16 Line register issue

Hello Sang,

welcome to the Polycom Community.

It is always useful to include the currently used UC Software version as issues experienced or a question asked may already be addressed in a newer release.

This also allows yourself and others to check against current software release notes, Administrator Guides or FAQ post’s.

The above is also stated in the "Read First"

Therefore the Polycom VoIP FAQ contains this post here:

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


I suggest to create a DNS record and register both Subscriber addresses that way.

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

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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