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Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 6 SPA9000 Field Reference
FXS 1/2 Tab
FAX Passthru Codec Select the codec for fax passthrough, G711u or G711a.
The default is G711u.
DTMF Process INFO (Not in PAP2T) To use the DTMF process info feature, select yes. Otherwise, select no.
The default is yes.
FAX Codec Symmetric To force the SPA9000 to use a symmetric codec during fax passthrough, select yes.
Otherwise, select no.
The default is yes.
DTMF Process AVT (Not in PAP2T) To use the DTMF process AVT feature, select yes. Otherwise, select no.
The default is yes.
FAX Passthru Method Select the fax passthrough method: None, NSE, or ReINVITE.
The default is NSE.
DTMF Tx Method Select the method to transmit DTMF signals to the far end: InBand, AVT, INFO, Auto,
InBand+INFO, or AVT+INFO. InBand sends DTMF using the audio path. AVT sends
DTMF as AVT events. INFO uses the SIP INFO method. Auto uses InBand or AVT based
on the outcome of codec negotiation.
The default is Auto.
FAX Process NSE To use the fax process NSE feature, select yes. Otherwise, select no.
The default is yes.
Hook Flash Tx Method Select the method for signaling hook flash events: None, AV T, 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.
FAX Disable ECAN 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.
Release Unused Codec 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.
FAX Enable T38 To enable the use of the ITU-T T.38 standard for faxing, select yes. Otherwise, select no.
The default is yes.
FAX Tone Detect Mode 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.