Parameter Description
Web: MLPP DiffServ
EMS: Diff Serv
[MLPPDiffserv]
Defines the DiffServ value (differentiated services code
point/DSCP) used in IP packets containing SIP messages that
are related to MLPP calls. This parameter defines DiffServ for
incoming MLPP calls with the Resource-Priority header.
The valid range is 0 to 63. The default is 50.
Notes:
 The same value must be configured for this parameter and
the parameter PremiumServiceClassControlDiffServ.
 Outgoing calls are tagged according to the parameter
PremiumServiceClassControlDiffServ.
Web/EMS: Precedence Ringing
Type
[PrecedenceRingingType]
Defines the index of the Precedence Ringing tone in the Call
Progress Tones (CPT) file. This tone is used when the
parameter CallPriorityMode is set to 1 and a Precedence call is
received from the IP side.
The valid range is -1 to 16. The default is -1 (i.e., plays standard
ringing tone).
EMS: E911 MLPP Behavior
[E911MLPPBehavior]
Defines the E911 (or Emergency Telecommunication
Services/ETS) MLPP Preemption mode:
 [0] = (Default) Standard Mode - ETS calls have the highest
priority and preempt any MLPP call.
 [1] = Treat as routine mode - ETS calls are handled as
routine calls.
[RPRequired]
Determines whether the SIP resource-priority tag is added in the
SIP Require header of the INVITE message for Tel-to-IP calls.
 [0] Disable = Excludes the SIP resource-priority tag from the
SIP Require header.
 [1] Enable = (Default) Adds the SIP resource-priority tag in
the SIP Require header.
Note: This parameter is applicable only to MLPP priority call
handling (i.e., only when the CallPriorityMode parameter is set to
1).
Multiple Differentiated Services Code Points (DSCP) per MLPP Call Priority Level (Precedence)
Parameters
The MLPP service allows placement of priority calls, where properly validated users can preempt
(terminate) lower-priority phone calls with higher-priority calls. For each MLPP call priority level, the
DSCP can be set to a value from 0 to 63. The Resource Priority value in the Resource-Priority SIP
header can be one of the following:
MLPP Precedence Level Precedence Level in Resource-Priority SIP Header
0 (lowest) routine
2 priority
4 immediate
6 flash
8 flash-override
9 (highest) flash-override-override
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