UC 520 maximum calls over SIP trunk

[Rui Carlos Antunes]

Hello.

What is the maximum number of simultaneous calls supported over a SIP trunk on a UC 520?

I know that for a Cisco 2801 is 55 and for a Cisco 2901 is 100, but I could not find any information for the UC 520/540/560 platforms.

Thanks in advance for your help.

Best regards,

Rui Antunes

[Christian Semmler · Accepted solution]

Hi Rui,

What are the maximum number of concurrent calls supported over UC500 SIP Trunks?

The main limit for the maximum number of calls is a function of the WAN bandwidth as that will limit the max number of active calls on the SIP Trunk. In general the UC500 has been tested to the max calls based on user limit on the UC520s & UC540s. On the UC560s it is typically upto 40 active calls max.

You find the information here:

https://supportforums.cisco.com/docs/DOC-9830#Does_the_UC500_support_VOIP_integration_with_non_Cisco_IP_PBXes_for_site_to_site_dialing