User`s manual

Version 5.4 189 May 2008
SIP User's Manual 3. Web-Based Management
¾ To configure the Stand-Alone Survivability parameters, take these
4 steps:
1. Open the 'SAS Configuration' page (Configuration tab > Protocol Configuration
menu > SIP Advanced Parameters submenu > Stand-Alone Survivability page
item).
Figure 3-74: SAS Configuration Page
2. Configure the parameters according to the table below.
3. Click the Submit button to apply your changes.
4. To save the changes to flash memory, refer to ''Saving Configuration'' on page 265.
Table 3-40: Stand-Alone Survivability Parameters Description
Parameter Description
Enable SAS
[EnableSAS]
Enables the Stand-Alone Survivability (SAS) feature.
 [0] Disable Disabled (default)
 [1] Enable = SAS is enabled
When enabled, the device receives the registration requests from different
SIP entities in the local network and then forwards them to the defined
proxy. If the connection to the proxy fails ('Emergency Mode'), the device
serves as a proxy by allowing calls internal to the local network or outgoing
to PSTN.
SAS Local SIP UDP Port
[SASLocalSIPUDPPort]
Local UDP port for sending and receiving SIP messages for SAS. The SIP
entities in the local network need to send the registration requests to this
port. When forwarding the requests to the proxy ('Normal Mode'), this port
serves as the source port.
The valid range is 1 to 65,534. The default value is 5080.
SAS Default Gateway IP
[SASDefaultGatewayIP]
The default gateway used in SAS 'Emergency Mode'. When an incoming
SIP INVITE is received and the destination Address-Of-Record is not
included in the SAS database, the request is immediately sent to this
default gateway.
The address can be configured as an IP address (dotted-decimal notation)
or as a domain name (up to 49 characters). The default is a null string,
which is interpreted as the local IP address of the gateway.
SAS Registration Time
[SASRegistrationTime]
Determines the value of the SIP Expires header that is sent in a 200 OK
response to an incoming REGISTER message when in SAS 'Emergency
Mode'.
The valid range is 0 (Analog) or 10 (Digital) to 2,000,000. The default
value is 20.