SIP User's Manual
324
Document #: LTRT-68808
Mediant
2000
Parameter
Description
Phone-Context Parameters
AddPhoneContextAsPrefix
For a description of this parameter, refer to ''Mapping NPI/TON
to Phone-Context'' on page
.
PhoneContext
This
ini
file table parameter defines the Phone Context table. The
format for this parameter is as follows:
[PhoneContext]
FORMAT PhoneContext_
Index
= PhoneContext_
Npi
,
PhoneContext_
Ton
, PhoneContext_
Context
;
[\PhoneContext]
Where,
Npi = Number Plan.
Ton = Type of Number.
Context = Phone-Context value.
When a call is received from the ISDN, the NPI and TON are
compared to 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).
For example:
[PhoneContext]
PhoneContext 0 = 0,0,unknown.com
PhoneContext 1 = 1,1,host.com
PhoneContext 2 = 9,1,na.e164.host.com
[\PhoneContext]
Notes:
This parameter can include up to 20 indices.
Several entries 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 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.
To configure the Phone Context table using the Web
interface, refer to ''Mapping NPI/TON to Phone-Context'' on
page
For a description on using
ini
file table parameters, refer to
''Structure of ini File Table Parameters'' on page
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