(resolved) Call Forward and No Answer Ring Duration issue (cucm 11.5)

[gdossantos1]

Hi everyone, 

I am having issues configuring Call Forwards.
Meaning : what I expect is since I don't have currently voice mail enabled, when an external call arrive on say phone 1. I want that the call be forwarded to phone 2 after 5-6 rings (default is about 3 rings which is not enough in my case).
So in the phone 1 configuration I put Forward No Answer External to Destination Phone 2 which works well.
Then I changed the default for "Forward No Answer Time" in order to have my value (24 secs) for all phones instead of just editing the "No Answer Ring Duration" of phone 1 and all phones.

When I received an external call on phone 1, it rings 5-6 times (24 secs) like expected but then it is forwarded to phone 2 that instantly drops the call.

If I keep the configuration for the forwarding but put defaults settings for the "Forward No Answer Time"(12 secs) , phone 1 rings 3 times (12 secs) then phone 2 rings 3 times too. All is working as expected.

So my thinking was that there is somewhere a timeout that drops the call when it reaches 24 seconds. But I've searched in all the settings and Cisco docs and I don't find anything like that. I mean there are values that must be greater that Forward No Answer Time but they all do are greater already even when I put 24 seconds.

Even if my phone 2 is actually a Hunt Pilot, I still have the same issue.

Can somebody tell me what I should check to resolve this issue?

Many thanks in advance

[Brandon Buffin]

What is the setting for the T301 timer (in Service Parameters)? Default is 180000 msec. It should be greater than the Forward No Answer Timer.

Brandon

[gdossantos1]

Brandon, 

It is one of the values I was talking about that are already greater than 24 seconds. (As for this one in particular I let the default setting)

Thanks

[Brandon Buffin]

When set to 24 sec, does phone 2 ever ring? Could your carrier have a ring no answer configuration on the line?

[gdossantos1]

Yep, phone 2 does ring but just for like 1 ms then it drops the call.

But when it is set to 12 seconds, phone 2 does ring just fine. 

I don't think my carrier have a ring no answer conf because I previsouly had an issue with which an unanswered call was ringing for ever even though the caller had hang out.

Don't ask me how I resolve this issue in particularI didn't, it was the guy that set up the system that did and I don't know how (I can ask though)

[Brandon Buffin]

If you set the internal Forward No Answer destination and call the phone internally does the same thing happen?

[gdossantos1]

No, in internal it's all good.

[Brandon Buffin · Accepted solution]

Couple of options:

1. Collect debugs at the gateway to determine the disconnect cause.

2. Contact the carrier to see what they see on their end when the call is disconnected.

Brandon

[gdossantos1]

Hi Brandon,

Sorry for the delay.
Thanks for your help !

[gdossantos1 · Accepted solution]

Hello everyone, 

I resolved this. It was in fact a setting to change in my GUI from my SIPtrunk provider.
By default, it was set to drop calls after 25 seconds.

Thanks,

[Anthony Vinod]

Hello Santos, Where is this option exactly? are you taking about SIP expire or connect timer under service parameter > Call Manager ?

[gdossantos1]

Hi Anthony, 

I wasn't talking about some parameter in CUCM.
The timeout was a setting from my SIP Trunk provider (OVH Telecom).

It was indeed a SIP expire at 25 seconds

[Anthony Vinod]

Oh ok, thanks for your information :)