1st call failed at remote site! 2nd call is OK!

[kcbell]

Folks:

I am copying what is on the Helpdesk ticket with my company.

Background: We just added a remote site to our Call Manager. Users at the remote site complained the below. Any insight with this issue is appreciated. The link between two sites is four multi-link T1(dedicated). Latency is 35mS.

"The phone gives a busy signal the first time he tries to dial a number but when he hits redial it works fine. It has done this consistently since the new IP phone setup in XXX."

KC

 

[whykap]

Is it just one user, all users or some experiencing this?
Is it all calls on that phone that behave that way?
Is it intermittent?
If not what type calls fail?
What type of lines are connected to the PSTN for that site? Are they all operating or are some out of service causing busy signals?

You might have 1FB's that are not connected or dead and when users hit that line the call fails. They try again and it accesses a working line and then the call connects.

Or you don't have enough lines to call out.

 

[kcbell]

whykap:

All users experienced the same behavior on different staions: The 1st call failed then the 2nd went thru. We have a T1 for local and another T1 for long distance. I don't beleive it was All Trunk Busy bahavior because there are less then 30 people in this remote office due to holidays and maintenance shutdown!

 

[whykap]

so can you put your phone at their location, configure it as it is at the remote site and duplicate the problem?
Have you run any debugs on the router to see what's happening when the call fails?