3Com VCX V7122, Руководство пользователя, Страница: 222 / 488

222
V7122 GatewayUser Guide
ini File Field Name
Web Parameter Name
Valid Range and Description
AltRoutingTel2IPMode
[Alt Routing Tel to IP Mode]
0 (None) = Alternative routing is not used.
1 (Conn) = Alternative routing is performed if ping to initial destination failed.
2 (QoS) = Alternative routing is performed if poor quality of service was
detected.
3 (All) = 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 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
Fax &
Modem Transport Modes .
IPConnQoSMaxAllowedPL
[
Max Allowed Packet Loss
for Alt Routing
]
Packet loss percentage at which the IP connection is considered a failure.
The range is 1% to 20%. The default value is 20%.
IPConnQoSMaxAllowedDe
lay
[Max Allowed Delay for Alt
Routing]
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.
Alternative Routing Parameters
AddPhoneContextAsPrefix
[Add Phone Context As
Prefix]
Determines whether or not the received Phone-Context parameter is added
as a prefix to the outgoing ISDN SETUP Called and Calling numbers.
Valid options include:
0 = Disable (default).
1 = Enable.
PhoneContext
[Phone Context Table]
When a call is received from the ISDN, the NPI and TON are compared
against the table, and the Phone-Context value is used in the outgoing SIP
INVITE message. The same mapping occurs when an INVITE with a Phone-
Context attribute is received. The Phone-Context parameter appears in the
standard SIP headers where a phone number is used (Request-URI, To,
From, Diversion).
PhoneContext = <Number Plan>,<Number Type>,<Phone-Context>
For example:
ƒ
PhoneContext = 0,0,unknown.com
ƒ PhoneContext = 1,1,host.com
ƒ
PhoneContext = 9,1,na.e164.host.com
This parameter can appear up to 20 times.
Several rows with the same NPI-TON or Phone-Context are
allowed. In this scenario, a Tel-to-IP call uses the first match.
Phone-Context '+' is a unique case as it doesn't appear in the
Request-URI as a Phone-Context parameter. Instead, it's
added as a prefix to the phone number. The '+' isn't removed
from the phone number in the IP-to-Tel direction.