Hi, I try to implement IP telephony to my entreprise. I got some phone
adaptor (Grandstream HT-496), connecting to my DID provider, but when I try
to synchronyse it with my UM_IP Gateway, It's seem that the ring is not
detected by my exchange server.

When I try UM-Connectivity port 5060, the result is :

"Error while trying to make a call. Details: Transport error occured while
sending. At line:1 char:20. Test-UmConnectivity <<<< -Listen Port 5060
-UMIPGateway ... "

What are the possibles reasons why an UM_IP Gateway don't get the call from
my phone adaptor...

I put an auto-attendant on my Dial plan, and it nerver go on .... But the
phone ring well when I call my phone number.

Any ideas or test .... (I try syslog, phone test and Um-Connectivity)

Thanks in advance

Archived from group: microsoft>public>exchange>applications