68 VoIP Subscriber Gateways
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.
- Take the transition to T.38 – when checked, incoming re-invite to T.38 from the opposite
gateway otherwise it will be enabled;
- Flash transfer – Flash transmission way:
off — Flash transmission disabled;
RFC2833–Flash transmission is performed according to RFC2833 recommendation,
as a dedicated payload in RTP voice packets
;
info – transfer ‘flash’ via SIP protocol. INFO messages are used for SIP protocol and
flash signal view will depend on MIME expansion type;
When choosing the option 'Transmit Flash: info' with 'Type of flash message':
dtmf-relay' when generating SIP INFO for flash, the extension specified for DTMF
transmission of SIP INFO messages is used
- Modem Transfer–defines switching into 'Voice band data' mode (according to V.152
recommendation). In VBD mode, the gateway disables the voice activity detector (VAD)
and comfort noise generator (CNG), this is necessary for establishing a modem
connection.
Off — disable modem signal detection;
G.711A VBD–use G.711A codec to transfer data via modem connection. Switching
to G.711A codec in VBD mode will be performed when the CED tone is detected;
G.711U VBD–use G.711U codec to transfer data via modem connection. Switching
to G.711U codec in VBD mode will be performed when the CED tone is detected;
G.711A NSE–CISCO NSE support, G.711A codec is used to transfer data via modem
connection;
_______________________________________
Flash transmission via RFC2833 is not available for firmware version 1.1.
To Next Page
Loading...
