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64
TAU-4M.IP Subscriber gateway
–
Off
– codec is not using.
–
G.711A – use G.711A codec;
–
G.711U – use G.711U codec;
–
T.38 – use T.38 protocol.
All fax codecs should be different! In addition when selecting G.711a or G.711u relecant
codec should be active in the list of device voice codecs.
Fax Detect Direction
–defines the call direction for fax tone detection and subsequent switching to
fax codec:
–
No detect fax
–disables fax tone detection, but will not affect fax transmission (switching
to fax codec will not be initiated, but such operation still may be performed by the
opposite gateway);
–
Caller and Callee
–tones are detected during both fax transmission and receiving. During
fax transmission, CNG FAX signal is detected from the subscriber's line. During fax
receiving, V.21 signal is detected from the subscriber's line;
–
Caller
–tones are detected only during fax transmission. During fax transmission, CNG FAX
signal is detected from the subscriber's line;
–
Callee
–tones are detected only during fax receiving. During fax receiving, V.21 signal is
detected from the subscriber's line;
Take the transition to T.38
- when checked incoming re-invite on T.38 on oncoming gateway is
enabled;
T.38 Redundancy count
- adding the redundancy into T.38 packets; value is corresponding to
amount of previous packets, which is doubling in every new T.38 packet. This redundancy method
is intended for case when the packets are lost in the transfer
.
Additional parameters
DTMF Transfer
–DTMF tone transmission method:
–
Inband
;
–
RFC2833
–according to RFC2833 recommendation, as a dedicated payload in RTP voice
packets;
–
SIP Info
- transmission of the messages via SIP in INFO queries.
Flash transfer
- flash transfer type:
