Posted at 21:27h
, smart foip
The wide-scale deployment of V.34 fax terminals is making the design of FoIP-capable IP-PSTN gateways much more of a challenge since V.34 terminals employ a completely different start-up sequence than non-V.34 machines. Moreover, since gateways typically begin calls in G.711 pass-through mode (rather than T.38), V.34-capable endpoints can actually “hear each other” well in advance of the resolution of the SIP signaling resolving the session’s setup. This means the gateways must take an “activist” role to ensure that T.38
is “given a chance” prior to the endpoints going on their merry way, leaving the gateways behind.