[cisco-voip] How NOT to send Suspend on ISDN?

[Kelemen Zoltan]

Hi,

  we have a customer with CME 4.0, and an ISDN PRI line to the PSTN. We 
had some complaints lately, that some calls coming from the PSTN 
disconnect when they want to transfer the call.

  Since we didn't find anything on our end, the PSTN provider offered a 
trace, telling that our problem is, that we are sending SUS (Suspend 
ISUP message) to the remote end, and some endpoints/PBXs/etc. will 
disconnect on a Suspend message.

While this seems a bit strange to me (I never hit this issue before with 
other providers), is there a way, I could block such messages from 
leaving our gateway and just provide the remote end with music on hold?

thanks,
  Zoltan