Nortel Networks TP-1610 SIP user manual EnableProxySRVQuery, AlwaysSendToProxy, SendInviteToProxy

Mediant 2000 SIP User’s Manual 6. ini File Configuration of the Mediant 2000

Table 6-3: SIP Configuration Parameters (continues on pages 100 to 110)

ini File Field Name		Valid Range and Description
Web Parameter Name*
EnableProxySRVQuery	Enables the use of DNS Service Record (SRV) queries to discover Proxy servers.
[Enable Proxy SRV Queries]	0	= Disabled (default).
	1	= Enabled.
	If enabled and the Proxy IP address parameter contains a domain name without port
	definition (e.g., ProxyIP = domain.com), an SRV query is performed. The SRV query
	returns up to four Proxy host names and their weights. The gateway then performs
	DNS A-record queries for each Proxy host name (according to the received weights) to
	locate up to four Proxy IP addresses. Therefore, if the first SRV query returns two
	domain names, and the A-record queries return 2 IP addresses each, no more
	searches are performed.
	If the Proxy IP address parameter contains a domain name with port definition (e.g.,
	ProxyIP = domain.com:5080), the gateway performs a regular DNS A-record query.
	Note: This mechanism is applicable only if ‘EnableProxyKeepAlive = 1’.
AlwaysSendToProxy	0	= Use standard SIP routing rules (default)
[Always Use Proxy]	1	= All SIP messages and Responses are sent to Proxy server
	Note: Applicable only if Proxy server is used.
SendInviteToProxy	0	= INVITE messages, generated as a result of Transfer or Redirect, are sent directly to
[Send All Invite to Proxy]	the URL (according to the refer-to header in the REFER message or contact header in
	30x response) (default).
	1	= All INVITE messages, including those generated as a result of Transfer or Redirect
	are sent to Proxy.
	Note: Applicable only if Proxy server is used and “AlwaysSendtoProxy=0”.
PreferRouteTable	Determines if the local Tel to IP routing table takes precedence over a Proxy for routing
[Prefer Routing Table]	calls.
	0	= Only Proxy is used to route calls (default).
	1	= The Proxy checks the 'Destination IP Address' field in the 'Tel to IP Routing' table
	for a match with the outgoing call. Only if a match is not found, a Proxy is used.
	Note: Applicable only if Proxy is not always used (‘AlwaysSendToProxy’ = 0,
	‘SendInviteToProxy’ = 0).
EnableProxyKeepAlive	0	= Disable (default)
[Enable Proxy Keep Alive]	1	= Keep alive with Proxy, by sending "OPTIONS" SIP message every
	“ProxyKeepAliveTime”.
	Note: This parameter must be enabled when Proxy redundancy is used.
ProxyKeepAliveTime	Defines the Proxy keep-alive time interval (in seconds) between OPTIONS messages.
[Proxy Keep Alive Time]	The default value is 60 seconds.
UseGatewayNameForOptio	0	= Use the gateway’s IP address in keep-alive OPTIONS messages (default).
ns	1	= Use ‘GatewayName’ in keep-alive OPTIONS messages.
[Use Gateway Name for	The OPTIONS Request-URI host part contains either the gateway’s IP address or a
OPTIONS]	string defined by the parameter ‘Gatewayname’.
	The gateway uses the OPTIONS request as a keep-alive message to its primary and
	redundant Proxies.
IsProxyHotSwap	Enable Proxy Hot Swap redundancy mode.
[Enable Proxy Hotswap]	0	= Disabled (default)
	1	= Enabled
	If Hot Swap is enabled, SIP INVITE message is first sent to the primary Proxy server. If
	there is no response from the primary Proxy server for “ProxyHotSwapRtx”
	retransmissions, the INVITE message is resent to the redundant Proxy server.
ProxyHotSwapRtx	Number of retransmitted INVITE messages before call is routed (hot swap) to another
[Number of RTX before	Proxy
Hotswap]	Range: 1-30
	The default is 3.
	Note: This parameter is also used for alternative routing using the Tel to IP Routing
	table. If a domain name in the routing table is resolved into 2 IP addresses, and if there
	is no response for ‘ProxyHotSwapRtx’ retransmissions to the Invite message that is
	sent to the first IP address, the gateway immediately initiates a call to the second IP
	address.

Version 4.4 101 July 2005