Cause value 16

Last Updated : Oct 14, 2014 |
[0x10/0x90]

Normal call clearing/ Requested facility not implemented (1TR6: AT&T ISDN Protocol)

Cause

Cause value 16 indicates that the call was disconnected normally by users at either end.

Cause value 16 (1TR6) indicates that the call cannot be completed because the equipment sending this cause value does not support the requested service, feature, or supplementary service in the SETUP message.

This cause value has end-to-end significance. Communication Manager returns this cause value back to the user who has originated the call.

Proposed Solution

Procedure

  1. Check the diagnostic information (DIAG) for the facility identifier of the unimplemented service. See Event data 2.
  2. If the remote device terminated the connection unexpectedly, check if there is a problem with the remote endpoint.
  3. For data bearer capability calls, if the connection has failed to establish, but the CONNECT and CONNECT_ACK messages were exchanged before the DISCONNECT was received, the handshake between the devices involved in the call have failed due to:
    1. Option settings with the endpoint devices
    2. Bandwidth constriction issues on the B-channels used by the two devices to make the call