Maximum Number of Calls Issue

[c1szhibin]

There were some IP Phone 7911 shared the same external number to PSTN and worked properly before.

After 7911 has been replaced by 6941, only 1 phone can dial out to PSTN at the same time, the others can't.

When the IT crew checked on the configuration between 7911 and 6941, they found 2 parameters are different.

	Maximum Number of Calls	Busy Trigger
7911	1	1
6941	2	1

The "Maximum Number of Calls" and "Busy Trigger" of 6941 can't be modified, but 7911 can. 

If they change those 2 parameters on 7911 as same as 6941. The result is the same.

Could anyone give me some hints to fix this problem?

[Manish Gogna]

Hi,

Please ensure that you are running cuc 8.6 or higher as per "Multiple Calls Per Line appearance" section of the following link

http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cuipph/6921_6941_6961/8_6/english/admin_guide/6921AG/6921usr.html

HTH

Manish

[Charles Hill]

Hello c1szhibin,

In addition to what Manish has stated, it looks like these phones are hitting bug CSCtq45335.

Shows a fixed release 9.2(1)SR1. 

You can try upgrading the firmware, if your not already there.

It does state ,In CUCM 8.6 and later, configuring maximum number of calls to 3 under phone's line page can avoid this issue.

Hope this helps,

Please rate helpful posts.

Thanks.