The default T.38 Fax relay feature employs the use of UDPTL transport which does not provide any encryption support. From Release 10.1, page 2 of the IP Codec-Set screen on the Communication Manager SAT interface allows you to administer SRTP transport for T-38 fax. This feature will provide the same encryption technique and strength as Avaya supports for voice and video transport.
Note:
This feature is not supported in G430 gateways that include MP80, MP20, and MP10 modules and 20 or 25 channel on-board DSPs. Only a plugin MP120 or the 40 channel on-board DSPs are supported.
