How to Check Active Call Count on SIP?

[Muthurani Lavanya Paneerselvam]

• Problem Description
• Solution
• Related Information

Problem Description

Requirement / Issue:

Service Provider is using ISR 3945 as a CUBE to connect to his interconnect Service Provider over SIP trunks. ISP is interested to know the total active SIP Calls on the trunk (not call legs). Is there a way we could arrive at the total active calls from the call  legs and identify the SIP-to-SIP calls on Cisco Unified Border Element (CUBE)?

Solution

Show commands to Identify the active call count on SIP:

Show commands

SBC03#Show call active voice compact Number of call-legs counted during viewing: 1448 SBC03#Show voip rtp connections Found 1459 active RTP connections SBC03#show call active voice brief | incl call-legs Telephony call-legs: 0 SIP call-legs: 1053 H323 call-legs: 0 Call agent controlled call-legs: 0 SCCP call-legs: 410 Multicast call-legs: 0 Total call-legs: 1463 Telephony call-legs: 0 SIP call-legs: 1050 H323 call-legs: 0 Call agent controlled call-legs: 0 SCCP call-legs: 410 Multicast call-legs: 0 Total call-legs: 1460 is not equal to the initial count. Some call-legs were Number of call-legs counted during viewing: 1460 SBC03# SBC03# SBC03# SBC03#sh sip-ua call su Total SIP call legs:1066, User Agent Client:526, User Agent Server:540 SBC03#sh call active voice summary Telephony call-legs: 0 SIP call-legs: 38 H323 call-legs: 0 Call agent controlled call-legs: 0 SCCP call-legs: 0 Multicast call-legs: 0 Total call-legs: 38 SBC03#sh sip-ua calls summary      Total SIP call legs:44, User Agent Client:19, User Agent Server:25 SBC03#sh call active voice summary Telephony call-legs: 0 SIP call-legs: 38 H323 call-legs: 0 Call agent controlled call-legs: 0 SCCP call-legs: 0 Multicast call-legs: 0 Total call-legs: 38 Since the above example is only on SIP-SIP calls you can see from active call Summary No. of SIP-SIP Calls = SIP call leg / 2  = 19 But there can be more on total legs as there can some calls being generated. If you have MTP/transcoder / conference then those legs will be more than the actual call leg. So we should take no. of SIP legs /2 for SIP-SIP calls.

 

Related Information

• SIP-to-SIP connections on a CUBE
• Cisco Unified Border Element (CUBE) / SIP Trunking Solutions

[Terry Cheema]

Good one just referred  someone here. +5

-Terry

[prasanna.k1]

Hi Muthurani,

Really good post. Thanks Terry in referring this to me :).

Editing after some more research:

Let me know if "show subscription sip summary" can be used to get the SIP subscription information (# of parallel SIP sessions we can make). Please guide me.

Regards,

Prasanna

[Kevin kamau]

Great post Muthurani. Thsi was really helpful

[Muthurani Lavanya Paneerselvam]

Thank you everyone. all your comments are really encouraging.

Regards

Lavanya

[lakshmanrao7]

Hi Lavanya, I am Lakshman, new to Cisco Voice World.. working as a UC engineer.. I need troubleshooting docs as well if you have any documents which are helpful to Voice World please share with me....my mail id is laxman.cisco@gmail.com... i have gone through your cisco support profile..nice and extraordinary ... Hope to hear from you soon.. Good Day .. 

[jgracecco]

So what the command to find out how many sip sessions i can actually establish on my 3945.  we have the uck9 lic and i think i read that it max at 950. But is there a max count i can see on my routers.  

[henryc199]

Very good article!! Thanks for the great job

[Vaijanath Sonvane]

Hi Muthurani,

Thank you for this detailed document.

You can also check SIP Trunk call activity through RTMT Tool. The "Trunk Activity" under Voice/Video section in RTMT Tool shows call activity for all SIP Trunks configured in CUCM. If you would like to see call activity for specific SIP Trunk, then you can go to System >> Performance >> Select CUCM >> Cisco SIP. Choose the performance counters under Cisco SIP to see Trunk activity. Please see the attached screenshots..

Thanks,

Vaijanath S.

Please rate if this is helpful.

[fdicko1@hotmail.com]

Hi 

Is it possible to get this information as a notification via e-mail?  i.e. Could I assign a threshold for active calls and then setup get a notification via SNMP? 

Thanks

Chris

[cnscisco]

Excellent post! This is Cisco Community working as intended!

[hostasaurus]

Is there a counter available via SNMP that contains a value that represents active SIP calls on the ISP side?  For example, only the 'client' side of "sh sip-ua call br", i.e. "Number of SIP User Agent Client(UAC) calls: ".   Or, just the ORG side of "show call active voice compact"?  Those values seem to properly count SIP sessions between our cubes and upstream providers, which are all that I care about when trying to measure SIP session utilization versus max concurrent sessions on the provider side, to see if we're coming close to the limit.

CISCO-VOICE-DIAL-CONTROL-MIB::cvCallVolConnActiveConnection.sip seems to double the count since it's counting phone to cube plus cube to PSTN.  I realize I can divide by two, but wasn't sure if that variable may increment from other types of calls the cube handles.