PLANET VGW-400FO - Manual (Page 46)

4-Port SIP Internet Telephony Gateway
VGW-400 Series
46
for the cancelled transaction(Default Value: 10,000 ms).**
General Request
Timeout Timer (msec)
After sending a General request, the User Agent waits for a
final response general Request Timeout Timer milliseconds
before timeout termination (in this time the User Agent
retransmits the request every T1, 2*T1,…T2,…milliseconds)**
Cancel Invite No
Response Timer (msec)
When sending a CANCEL request on an Invite request, the
User Agent waits for this timer before timeout termination if
there is no response for the cancelled transaction.
Provisional Timer
(msec)
The provisional Timer is set when receiving a provisional
response on an INVITE transaction. The transaction will stop
retransmissions of the INVITE request and will wait for a final
response until the provision Timer was expired. If you set the
provision Timer to 0, no timer is set. The INVITE transaction will
wait indefinitely for the final response.
First Response Timer
(msec)
When sending a request out, the User Agent waits this timer for
any response received from UAS. If timer is expired and no any
SIP message is received, the User Agent will think the request
is failed. The default is 5 seconds.
MWI Subscription
Expiry (sec)
You can Enable or Disable the MWI subscription. The default is
600 sec. If a new voice mail arrives, the stutter tone will be used
instead of regular dial tone. This feature is dedicated to FXS
only.
Line Congestion Code
When receiver’s end was contacted successfully from
originated site but the receiver site is busy and does not wish to
answer the call at this time, the system will response the code,
default is 600. ( FXO only )
SIP-Info Flash Mode
When you enable the feature, system will make flash key to
send SIP message by sip-info.
Encrypt
Disable: disable encryption function.
VGCP is a proprietary layer 2 link protocol working at between
IP stack and NIC driver for VoIP anti-blocking. The core
patent-pending VGCP is industry's most state-of-art voice
service provider class security protocol whose scalability and
flexibility results in not to compromise voice quality and
overhead. VGCP controls and monitors full voice signaling and
media flow intelligently; meanwhile disguise sip and RTP
packets into normal allowed data packets such as DNS and