Hi John, EM service is based on HTTS request and response. I would do the following to resolve this: > restart the EM service and check if the issue resolved > If we have done above, collect the packet capture from the phone and the cucm server providing the EM service -----> to check the communication between the server and the phone. > If we have done the above, collect the EM service logs for a test login  ---> to find out if the service itself is not behaving correctly. Please upload the logs/captures for a test login to check further if still not resolved. ~Amit Please rate if helpful ... View more

Hi Here what you need to do: For eg. you get the DID rage 408-222-2001-30 => Configure each phone with number range 2001-30 ----> You can configure any other range and translate the rage later on the CUCM. But, for simplicity i am taking this example. => Configure the E1 on the gateway ---->  **Now this depends on how you want to use it, you can configure this using MGCP, here is the document you can follow: http://www.cisco.com/c/en/us/support/docs/voice/media-gateway-control-protocol-mgcp/23966-mgcp-pri-cm.html **You can just configure it for the PRI timeslots if you are going to use H.323/SIP with CUCM, here is the document you can follow: https://supportforums.cisco.com/document/12231781/how-configure-h323-pri-and-gateway-cucm-10x => After the PRI is configured, you can go the the Gateway> Inbound call setting and use "Significant Digits" as only 4, so that the calls are routed directly to the phone. Now, this setting depends on your internal DN assigned to the phones. You can use the significant digit based on this. You need to assign the DID to each channel and this not even possible with PRI circuits, it can only be possible with FXO circuits. ~Amit Please rate if helpful ... View more