No response from the remote station in sending Session
Initiation Protocol (SIP).
No acknowledgement returned after Fax2 net command
Called using a dial number that cannot be used for the
NGN line (33 digits or longer or non numeric characters).
Detected that access to the NGN line was not authorized.
No file or folder (directory) found as a result of search via
the NGN line. (T38: 404 Not Found)
Remote station does not support the NGN line. (T38: 488
SIP (Session Initiation Protocol) connection not possible.
USW NGN fax setting is OFF or calling attempted before
acquisition of SIP information.
Internal error detected in the communication network.
1C01,1C02,1C03,1C04,1C06,1D01,1D02 or 1D04 was
Detected that the NGN line was temporarily unavailable.
Network cable not connected (Link Down detected) or not
connected to the Network. (T38)