AudioCodes Mediant 500L - Page 597

Version 7.2 597 Mediant 500L Gateway & E-SBC
User's Manual 27. Configuring Supplementary Services
Level IE Network Domain in SIP Resource-Priority Header
0003 nato
Note:
• If the received ISDN message contains NI digits that are not listed in the
translation table, the device sets the network-domain to "uc" in the outgoing SIP
message.
• If the received SIP message contains a network-domain value that is not listed in
the translation table, the device sets the NI digits to "0000" in the outgoing ISDN
message.
• If the received ISDN message does not contain a Precedence IE, you can
configure the namespace value - dsn (default), dod, drsn, uc, or cuc - in the SIP
Resource-Priority header of the outgoing INVITE message. This is done using the
MLPPDefaultNamespace parameter. You can also configure up to 32 user-defined
namespaces, using the table ini file parameter, ResourcePriorityNetworkDomains.
Once defined, you need to set the MLPPDefaultNamespace parameter value to
the desired table row index.
By default, the device maps the received Resource-Priority field of the SIP Resource-
Priority header to the outgoing ISDN Precedence Level (priority level) field as follows:

If the network-domain field in the Resource-Priority header is "uc", then the device
sets the Precedence Level field in the ISDN Precedence Level IE according to Table
5.3.2.12-4 (Mapping of RPH r-priority Field to ISDN Precedence Level Value):
Table 27-5: Mapping of SIP Resource-Priority Header to ISDN Precedence Level for MLPP
MLPP Precedence Level ISDN Precedence Level SIP Resource-Priority Header Field
Routine 4 0
Priority 3 2
Immediate 2 4
Flash 1 6
Flash Override 0 8

If the network-domain field in the Resource-Priority header is any value other than
"uc", then the device sets the Precedence Level field to "0 1 0 0" (i.e., "routine").
This can be modified using the EnableIp2TelInterworkingtable field of the ini file parameter,
ResourcePriorityNetworkDomains.
Note:
• If required, you can exclude the "resource-priority” tag from the SIP Require
header in INVITE messages for Tel-to-IP calls when MLPP priority call handling is
used. This is configured using the RPRequired parameter.
• For a complete list of the MLPP parameters, see ''MLPP and Emergency Call
Parameters'' on page 1146.