Release Notes 4. Previous Version 2.6.1
Version 2.6.3 17 November 2008
4.3 Known Limitations in Version 2.6.1
Version 2.6.1 includes the following known limitations:
Faxes can be sent between the two local lines only if the selected 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
outgoing call.
A silence period of about three seconds is created after pressing the ‘Flash’ key during a
conversation (normally, the user presses ‘Flash’ + ’1’, ‘Flash’ + ’2’, or ‘Flash’ + ’3’). This limitation
does not occur when in ‘Flash only’ key sequence mode.
When pressing ‘Flash’ + ’1’ or ‘Flash’ + ’2’ (for call hold and transfer), the DTMF is sometimes
heard at the remote side.
QoS traffic shaping: Enabling ‘TCP Serialization’ may cause problems viewing real-time video
streams on a PC that is connected to the device.
Caller ID Type II audio indication is sometimes heard by both the calling and the called parties. The
remote side doesn't hear the FSK; only a 2833 DTMF tone.
To ensure that the OPTIONS Keep-Alive feature is fully functional, the remote side must send any
message, including the “501 Not implemented” message.
Enabling or disabling the Periodic Checking of Configuration File feature requires a reboot.
SIP NOTIFY with a “check-sync” event with a message body causes system restart even if there
are ongoing conversation calls.
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