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How to Check Active Call Count on SIP?

 

 

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

Comments

Good one just referred  someone here. +5

-Terry

Community Member

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

 

Community Member

Great post Muthurani. Thsi was really helpful

Thank you everyone. all your comments are really encouraging.

Regards

Lavanya

Community Member

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 .. 

Community Member

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.  

Community Member

Very good article!! Thanks for the great job

Hi ,

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.

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