User's Manual 1110 Document #: LTRT-10632
Mediant 800B Gateway & E-SBC
Parameter Description
continues scanning for a Proxy. When the device locates an
active Proxy, it switches from internal routing back to Proxy
routing.
Note: To enable the redundant Proxies mechanism, set the
parameter EnableProxyKeepAlive to 1 or 2.
Prefer Routing Table
configure voip > sip-definition
proxy-and-registration > prefer-
routing-table
[PreferRouteTable]
Determines whether the device's routing table takes precedence
over a Proxy for routing calls.
[0] No = (Default) Only a Proxy server is used to route calls.
[1] Yes = The device checks the routing rules in the Tel-to-IP
Routing table for a match with the Tel-to-IP call. Only if a
match is not found is a Proxy used.
Always Use Proxy
configure voip > sip-definition
proxy-and-registration > always-
use-proxy
[AlwaysSendToProxy]
Determines whether the device sends SIP messages and
responses through a Proxy server.
[0] Disable = (Default) Use standard SIP routing rules.
[1] Enable = All SIP messages and responses are sent to the
Proxy server.
Note: The parameter is applicable only if a Proxy server is used
(i.e., the parameter IsProxyUsed is set to 1).
SIP ReRouting Mode
configure voip > sip-definition
settings > sip-rerouting-mode
[SIPReroutingMode]
Determines the routing mode after a call redirection (i.e., a 3xx
SIP response is received) or transfer (i.e., a SIP REFER request
is received).
[0] Standard = (Default) INVITE messages that are generated
as a result of Transfer or Redirect are sent directly to the URI,
according to the Refer-To header in the REFER message, or
Contact header in the 3xx response.
[1] Proxy = Sends a new INVITE to the Proxy.
Note: This option is applicable only if a Proxy server is used
and the parameter AlwaysSendtoProxy is set to 0.
[2] Routing Table = Uses the Routing table to locate the
destination and then sends a new INVITE to this destination.
Note:
The parameter is applicable only to the Gateway application.
When the parameter is set to [1] and the INVITE sent to the
Proxy fails, the device re-routes the call according to the
Standard mode [0].
When the parameter is set to [2] and the INVITE fails, the
device re-routes the call according t
o the Standard mode [0]. If
DNS resolution fails, the device attempts to route the call to
the Proxy. If routing to the Proxy also fails, the
Redirect/Transfer request is rejected.
When the parameter is set to [2], the XferPrefix parameter can
be used to define different routing rules for redirect calls.
The parameter is disregarded if the parameter
AlwaysSendToProxy is set to 1.
DNS Query Type
configure voip > sip-definition
settings > dns-query
[DNSQueryType]
Enables the use of DNS Naming Authority Pointer (NAPTR) and
Service Record (SRV) queries to resolve Proxy and Registrar
servers and to resolve all domain names that appear in the SIP
Contact and Record-Route headers.
[0] A-Record = (Default) No NAPTR or SRV queries are
performed.
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