System information

Configuring the Voice Settings
Line1 Settings (PHONE Port)
Cisco SPA232D Administration Guide 115
4
DTMF Tx Strict
Hold Off Time
This parameter is in effect only when DTMF Tx Mode is set
to strict, and when DTMF Tx Method is set to out-ofband;
i.e. either AVT or SIP-INFO. The value can be set as low as
40 ms. There is no maximum limit. A larger value will
reduce the chance of talk-off (beeping) during
conversation, at the expense of reduced performance of
DTMF detection, which is needed for interactive voice
response systems (IVR) Default: 70 ms
FAX Enable T38 To enable the use of ITU-T T.38 standard for FAX Relay,
select yes. Otherwise select no.
Default setting: yes
Hook Flash Tx
Method
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.
Default setting: None
FA X T38
Redundancy
Select the appropriate number to indicate the number of
previous packet payloads to repeat with each packet.
Choose 0 for no payload redundancy. The higher the
number, the larger the packet size and the more
bandwidth consumed.
Default setting: 1
FA X T38 ECM
Enable
Select yes to enable T.38 Error Correction Mode.
Otherwise select no.
Default setting: yes
FA X Tone Detect
Mode
This parameter has three possible values:
• caller or callee: The ATA will detect FAX tone
whether it is callee or caller
• caller only: The ATA will detect FAX tone only if it is
the caller
• callee only: The ATA will detect FAX tone only if it is
the callee
Default setting: caller or callee.
Field Description