Cisco Linksys SPA9000 - Manual (Page 105)

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Linksys SPA9000 Administrator Guide
Document Version 3.01
Chapter 4 Configuring SPA9000 Features
Basic Call Management
This example specifies the following:
• Lines 1 and 2 are allowed when the called number starts with 9
• Line 3 is allowed if the called number starts with 011852
• Line 4 is allowed if the number starts with *1800 followed by seven more digits.
One or more client station patterns can be specified in x Line>, with each pattern separated by
a comma. Each pattern may contain the “*” and “?” wildcards, or “%xx” escaped characters. For
example:
x Line> = 51*,56%2a*,577?
In this example, any number starts with 51 or 56*, and any four-digit number starting with 577 belongs
to Group x.
Each line interface has a finite call capacity (maximum number of simultaneous calls allowed on the
line), which is statically configured in the line parameter. When the maximum call
capacity is reached, the SPA9000 does not allocate any more calls to that line interface.
Each line interface behaves as a Back-To-Back User Agent (B2BUA).
Note the following:
• The INVITE sent to the ITSP carries a “ref” URI parameter in the FROM header that specifies which
is the extension. Below is an example where the 5031 is the extension that originates the call to the
external number 37683103.
INVITE sip:[email protected] SIP/2.0
Via: SIP/2.0/UDP 192.168.2.205:5060;branch=z9hG4bK-9ee9fbdd
From: PBX Line 1
[email protected]>;tag=4625e6e97e37072ao2;ref=5031
To: [email protected]>
Call-ID: [email protected]
CSeq: 101 INVITE
Max-Forwards: 70
Contact: PBX Line 1 [email protected]:5060>...
• The default for provisioning the client stations is:
(9,[3469]11S0|9,<:1408>[2-9]xxxxxx|9,<:1>[2-9]xxxxxxxxxS0|9,1[2-9]xxxxxxxxxS0|
9,011xx.|9,xx.|[1-8]xxx)
This dial plan specifies to dial 9 to get an outside line. The of each line interface, on
the other hand, is set to (<9:>xx.) which strips the leading digit 9 from the number dialed by the
client station.
External Users Calling the SPA9000
When the SPA9000 receives an external incoming call to its line interfaces (Line 1, 2, 3, or 4), it consults
the line to identify the client stations to alert. The parameter may contain
one or more number patterns, with each pattern separated by a comma. Each pattern may contain the “*”
and “?” wildcard or “%xx” escaped characters.
For example:
Line 1 = 531?,aa.