Trunk fails to accept 3 calls at the same time.

[Tom Waterman]

Is there anyway the PBX would prevent a call from coming in? Here is my setupo. I have an older T1 that comes into an Audiocodes Mediant 1K. I can make 2 calls at the same time with no problem. On the 3rd call the caller receives a fast busy. It does not make any difference if it is 3 calls coming into the system or one in and 2 out or 3 out. It is the addition of the 3 call that causes this. Here is what I see in the Gateway.

 

SIP/2.0 500 Line Unavailable<013><010>Via: SIP/2.0/UDP 10.130.1.236;branch=z9hG4bKac388051577<013><010>From:

 

And then the reorder tone is played.

Any help would be greatly appreciated.

 

I have received a call back from audiocodes and they told me that it is th PBX stating the line is no available and not the gateway.

Tom

[Vodia PBX]

Is there anyway the PBX would prevent a call from coming in? Here is my setupo. I have an older T1 that comes into an Audiocodes Mediant 1K. I can make 2 calls at the same time with no problem. On the 3rd call the caller receives a fast busy. It does not make any difference if it is 3 calls coming into the system or one in and 2 out or 3 out. It is the addition of the 3 call that causes this. Here is what I see in the Gateway.

 

SIP/2.0 500 Line Unavailable<013><010>Via: SIP/2.0/UDP 10.130.1.236;branch=z9hG4bKac388051577<013><010>From:

 

And then the reorder tone is played.

Any help would be greatly appreciated.

 

I have received a call back from audiocodes and they told me that it is th PBX stating the line is no available and not the gateway.

 

Well if you have only two CO-lines on that trunk a third call is going to be rejected by the PBX. That is a feature! check the trunk settings and consider adding more CO-lines. (Edit "trunk page->CO Lines" field)