3Com
®
VCX V7111 VoIP Gateway User Guide
117
Parameter Description
Enable Alt Routing Tel to IP
[AltRoutingTel2IPEnable]
No
[0]
= Disable the Alternative Routing feature
(default).
Yes
[1]
= Enable the Alternative Routing feature.
Status Only
[2]
= The Alternative Routing feature is
disabled. A read-only information on the quality of service of the destination
IP addresses is provided.
For information on the Alternative Routing feature, see
Configuring the
Gateways Alternative Routing (based on Connectivity and QoS)
.
Alt Routing Tel to IP Mode
[AltRoutingTel2IPMode]
None
[0]
= Alternative routing is not used.
Conn
[1]
= Alternative routing is performed if ping to initial destination
failed.
QoS
[2]
= Alternative routing is performed if poor quality of service was
detected.
Both
[3]
= Alternative routing is performed if, either ping to initial
destination failed, or poor quality of service was detected, or DNS host
name is not resolved (default).
QoS (Quality of Service) is quantified according to delay and
packet loss, calculated according to previous calls. QoS statistics
are reset if no new data is received for two minutes.
For information on the Alternative Routing feature, see
Configuring
the Gateways Alternative Routing (based on Connectivity and
QoS)
.
Max Allowed Packet Loss for Alt
Routing [%]
[IPConnQoSMaxAllowedPL]
Packet loss percentage at which the IP connection is considered a failure.
The range is 1% to 20%. The default value is 20%.
Max Allowed Delay for Alt
Routing [msec]
[IPConnQoSMaxAllowedDelay]
Transmission delay (in msec) at which the IP connection is considered a
failure.
The range is 100 to 1000. The default value is 250 msec.
Tel to IP Routing Table
The Tel to IP Routing Table is used to route incoming Tel calls to IP addresses. This routing
table associates a called / calling telephone numbers prefixes with a destination IP address
or with an FQDN (Fully Qualified Domain Name). When a call is routed through the VoIP
gateway (Proxy is not used), the called and calling numbers are compared to the list of
prefixes on the IP Routing Table (up to 50 prefixes can be configured); Calls that match
these prefixes are sent to the corresponding IP address. If the number dialed does not match
these prefixes, the call is not made.
When using a Proxy server, you do not need to configure the Tel to IP Routing Table.
However, if you want to use fallback routing when communication with Proxy servers is lost,
or to use the Filter Calls to IP and IP Security features, or to obtain different SIP URI host
names (per called number) or to assign IP profiles, you need to configure the IP Routing
Table.
Note that for the Tel to IP Routing table to take precedence over a Proxy for routing calls, set
the parameter PreferRouteTable to 1. The gateway 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.
Summary of Contents for VCX V7111
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