Cisco SPA2102-AN - Single Port Router Administration Manual page 210

ATA Voice Field Reference
PSTN Line page (SPA3102)
Cisco Small Business ATA Administration Guide
Hook Flash Tx
Method
FAX Disable ECAN
Release Unused
Codec
FAX Enable T38
FAX Tone Detect
Mode
Symmetric RTP
Select the method for signaling hook flash events: None,
AVT, or INFO. None does not signal hook flash events. AVT
uses RFC2833 AVT (event = 16). INFO uses SIP INFO with
the single line signal=hf in the message body. The MIME
type for this message body is taken from the Hook Flash
MIME Type setting.
The default is None.
If enabled, this feature automatically disables the echo
canceller when a fax tone is detected. To use this feature,
select yes. Otherwise, select no.
The default is no.
This feature allows the release of codecs not used after
codec negotiation on the first call, so that other codecs can
be used for the second line. To use this feature, select yes.
Otherwise, select no.
The default is yes.
To enable the use of the ITU-T T.38 standard for faxing,
select yes. Otherwise, select no.
The default is yes.
This parameter has three possible values:
caller or callee - SPA will detect FAX tone whether it is
callee or caller
caller only - SPA will detect FAX tone only if it is the caller
callee only - SPA will detect FAX tone only if it is the callee
The default is caller or callee.
(SPA3102 and SPA8800 only) Enable symmetric RTP
operation. If enabled, the ATA sends RTP packets to the
source address and port of the last received valid inbound
RTP packet. If disabled (or before the first RTP packet
arrives) the ATA sends RTP to the destination as indicated
in the inbound SDP.
The default is yes.
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