Reason Header; Numbering Plans And Type Of Number - AudioCodes Mediant 3000 User Manual

24.8.3 Reason Header

The device supports the SIP Reason header according to RFC 3326. The Reason header
conveys information describing the disconnection cause of a call:

Sending Reason header: If a call is disconnected from the Tel side (ISDN), the
Reason header is set to the received Q.850 cause in the appropriate message
(BYE/CANCEL/final failure response) and sent to the SIP side. If the call is
disconnected because of a SIP reason, the Reason header is set to the appropriate
SIP response.

Receiving Reason header: If a call is disconnected from the IP side and the SIP
message includes the Reason header, it is sent to the Tel side according to the
following logic:
•
If the Reason header includes a Q.850 cause, it is sent as is.
•
If the Reason header includes a SIP response:
♦
♦
•
When the Reason header is received twice (i.e., SIP Reason and Q.850), the
Q.850 takes precedence over the SIP reason and is sent to the Tel side.
24.9

Numbering Plans and Type of Number

The IP-to-Tel destination or source number manipulation tables allow you to classify
numbers by their Numbering Plan Indication (NPI) and Type of Number (TON). The device
supports all NPI/TON classifications used in the ETSI ISDN variant, as shown in the table
below:
NPI
Unknown [0] Unknown [0]
E.164 Public Unknown [0]
[1]
International [1]
National [2]
Network Specific [3]
Subscriber [4]
Abbreviated [6]
Private [9] Unknown [0]
Level 2 Regional [1]
User's Manual
If the message is a final response, the response status code is translated to
Q.850 format and passed to ISDN.
If the message isn't a final response, it is translated to a Q.850 cause.
Table 24-10: NPI/TON Values for ETSI ISDN Variant
TON
A valid classification, but one that has no information about
the numbering plan.
A public number in E.164 format, but no information on
what kind of E.164 number.
A public number in complete international E.164 format,
e.g., 16135551234.
A public number in complete national E.164 format, e.g.,
6135551234.
The type of number "network specific number" is used to
indicate administration / service number specific to the
serving network, e.g., used to access an operator.
A public number in complete E.164 format representing a
local subscriber, e.g., 5551234.
The support of this code is network dependent. The
number provided in this information element presents a
shorthand representation of the complete number in the
specified numbering plan as supported by the network.
A private number, but with no further information about the
numbering plan.
Description
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Mediant 3000
Document #: LTRT-89738