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RealPresence Group 500 - CUCM

dim_hatzi
Occasional Visitor

RealPresence Group 500 - CUCM

I want to establish the following architecture, but I am facing some problems.

 

Group500 --> CUCM1 --> SBC --> WAN --> SBC --> CUCM2 --> Group50

 

On CUCM1 and CUCM2 there are already tens of registered CISCO VoIP phones, and the communication between them is without problems. Also the Group500 devices are registered normally on the respective CUCMs and between them can be establised audio only connection, but no video.

Can anyone figure out what may the problem is ?

 

PS. When the Group500 Devices are registered on the same CUCM (locally) , the connection is ok (both video and audio)... Also when calls are being made by IP Dialling (without SIP registration) there is no problem. 

 

Thanx in advance

Message 1 of 10
9 REPLIES 9
SteffenBaierUK
Polycom Employee & Community Manager

Re: RealPresence Group 500 - CUCM

Hello Dim,

welcome to the Polycom Community.

The community's Video contains this post here:

  • Jun 21,2014 Question: Are there specific Ports in my firewall that I need to open in order to utilize video conferencing?

    Answer: Please check the relevant release notes or admin guide for your device under the section “Inbound and Outbound Ports” or "Port usage" => here <=.

    In addition check this FAQ post => here <= for more details and troubleshooting suggestions.

 

  • Jun 21,2014 Question: What could be causing one way video or one way audio when utilizing video conferencing?

    Answer: Please check the relevant release notes or admin guide for your device under the section “Inbound and Outbound Ports” or "Port usage" => here <= in order to open the relevant firewall ports.

    In addition check this FAQ post => here <= for more details and troubleshooting suggestions.

Most likely some firewall is blocking the ports used by the Video

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 Polycom 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.

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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 10
Joe Vallender
Valued Contributor

Re: RealPresence Group 500 - CUCM

You might do some packet captures out of the CUCM where the call is initiated to see if the INVITE is requesting video.  If not, then the CUCM  SIP trunk config may not be set up correctly for video.

JoeV
Message 3 of 10
dim_hatzi
Occasional Visitor

Re: RealPresence Group 500 - CUCM

Thank you for the quick response!

There is no firewall between the architecture...

Also it is quite strange when i try to enter the range of the RTP UDP ports..

I cannot change the TO: port.. The input field is disabled (see screenshot)

 

Joe Vallender
Valued Contributor

Re: RealPresence Group 500 - CUCM

By checking FIXED PORTS, the system selects the TO range.  Uncheck FIXED PORTS and you should be able to specify the FROM/TO, I believe.

JoeV
Message 5 of 10
dim_hatzi
Occasional Visitor

Re: RealPresence Group 500 - CUCM

Unchecking Fixed Port, both fields are disabled...

Message 6 of 10
dim_hatzi
Occasional Visitor

Re: RealPresence Group 500 - CUCM

Propably when fixed ports is not checked, there is a dynamic allocation of ports used... but in any case there is no firewall in my architecture and traffic is permitted (because this is in development stage!) 

Message 7 of 10
Mike_v
Honored Contributor

Re: RealPresence Group 500 - CUCM


@dim_hatzi wrote:

.....

There is no firewall between the architecture...

..... 


You are not right, at least two SBCs are involved in your schema. The SBCs could be configured to allow voice codecs only.

WBR,
Mike
--------------------------------------------
“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”
― Donald Rumsfeld
Message 8 of 10
dim_hatzi
Occasional Visitor

Re: RealPresence Group 500 - CUCM

So,

is there any proposed solution for this ?

Message 9 of 10
Mike_v
Honored Contributor

Re: RealPresence Group 500 - CUCM

You need to contact with your network administrator and then with Cisco support team.

WBR,
Mike
--------------------------------------------
“Reports that say that something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know. We also know there are known unknowns; that is to say we know there are some things we do not know. But there are also unknown unknowns- the ones we don't know we don't know.”
― Donald Rumsfeld
Message 10 of 10