Release Notes 3. Previous Versions
Version 2.6.0 11 February 2008
3 Previous Versions
3.1 Version 2.4.2
3.1.1 What’s New in Version 2.4.2
The following new features are supported in Version 2.4.2:
Call Waiting Reminder Ring (CWRR). If a user on-hooks the phone and there is another call (a call
on hold) or a call waiting, the user hears the phone ringing, indicating that there is someone waiting
on the line.
Distinctive ringing. The ringing tone can be defined by the Alert-Info header in INVITE or 180
Ringing SIP messages. The ringing tone defined in the Alert-Info header is played locally.
Automatic Dialing (Hot Line): When this feature is enabled, an automatic call is placed when the
user off-hooks the phone. The user should configure the phone number that is automatically dialed
and the timeout between off-hook and phone call execution.
Secondary Dial Tone: When this feature is enabled, a secondary dial tone is generated when the
user off-hooks the phone and dials a preconfigured digit.
Remote Flash hook control: sends a flash hook via SIP INFO message.
User-Agent field included in the INVITE SIP message.
SIP INVITE messages include the sendrcv attribute.
The digit ‘#’ can be sent as the first digit.
Howler tone: informs a user that the user's phone has been left in an off-hook state for a long
period of time (configurable).
FXS Polarity Reversal.
Timeout for unanswered call. An unanswered call is canceled after a given timeout (CANCEL SIP
message is sent).
PRACK and REFER authentication.
SIP response 180 Ringing with media description (as early media).
The rport parameter can be enabled or disabled.
PRACK can be enabled or disabled.
Domain name supported in “from” and “to” fields of a REGISTER message.
3.1.2 Known Limitations in Version 2.4.2
Following are known limitations:
The default device software version doesn't support IPSec. Contact AudioCodes for availability of
IPSec support as a separate software option.
Faxes can be sent between the two local lines only if the chosen fax transport mode is Transparent
(in G.711).
The Web interface is not automatically refreshed during the firmware upgrade process.
After the dial tone timeout has expired (and a fast-busy tone is played), the user can still make an
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