Issue:One of the most common reasons for inbound T37 OnRamp faxes to fail  is connection issues with the SMTP server. This could happen due to one  of the following reasons:No SMTP Server configuredSMTP Server configured but no IP route to server exi...

IntroductionStarting IOS version 15.1(2)T, we can  match inbound dial-peers via IP Address or hostname. This enables  CUBE/TDM-SIP to connect to two or more different ITSPs allowing specific  call routing, codec selection, digit manipulation, CAC, Qo...

AboutT.37 (Store-and-Forward) is an ITU standard which deals with sending  and receiving fax messages using an email. It defines the basic  communication procedures between the voice gateway and both the PSTN fax  and mail server used in a T.37 call ...

About There may be scenarios where a third party vendor’s PBX hardware uses  a proprietary ISDN signaling protocol. Unless the same PBX (signaling  standard) is used on both ends of the circuit, you need a way so that  the two PBXs or voice  gateways...

IntroductionWith the number of faxing protocols supported by Cisco devices and Service Providers, it is easy to get confused with all the possibilities. The important point to note is that in a fax call flow, all the devices on VoIP need to utilize t...