This Modify SRI Leg feature modifies outbound messages sent between two network elements, typically a Serving MSC (SMSC) and an MSC.

Description

The Modify SRI Leg feature acts as an intermediary between two network elements, typically an SMSC and MSC. The feature modifies outbound Send Routing Info for SM requests, and/or discards outbound InformSC requests based on configuration. This is primarilly intended for use with the Map Proxy Feature to ensure that outbound SendRoutingInfoForSM messages have SM RP PRI set to true, and to ensure InformSC requests are not proxied.

Tip

The IPSMGW uses the Modify SRI Leg feature in Sending Routing Info For SM call flows.

Feature cheat sheet

Feature Name Network Operator Data Used in PlanId(s) Stateful or Stateless POJO Feature or SBB Feature

IPSMGWModifySRILeg

Yes

SRI4SM

Stateless

POJO

Statistics

IPSMGWModifySRILeg statistics can be found under the following parameter set in REM:
SLEE-Usage → sentinel.ipsmgw service → sentinel.ipsmgw SBB → feature → IPSMGWModifySRILeg
or with rhino-stats:
"SLEE-Usage.Services.ServiceID[name=sentinel.ipsmgw,vendor=OpenCloud,version=3.1.0].SbbID[name=sentinel.ipsmgw,vendor=OpenCloud,version=3.1.0].feature.IPSMGWMapProxy

Name Description
InformSCDiscarded

Incremented when an outbound InformSC is discarded.

SMRPPRIForced

Incremented when an outbound SentRoutingInfoForSM request has the Sm_RP_PRI field forced to true.

GPRSSupportIndicatorRemoved

Incremented when an outbound SentRoutingInfoForSM request has the GPRS Support indicator removed.

Configuration

The feature configuration is in a Profile Table called IPSMGWModifySRILegConfigProfileTable. Entries in the table are indexed by a Sentinel Selection key. The following attributes are available

Attributes Type Meaning
DiscardInformSC

boolean

If true, discard outbound InformSC components

ForceSMRPPRI

boolean

If true, force Sm_RP_PRI to be set to true in SendRoutingInfoForSM requests

In the example below, the IPSMGWModifySRILeg feature is configured so InformSC messages are discarded, but SendRoutingInfoForSM messages are sent unmodified.

Profile Name

DiscardInformSC

ForceSMRPPRI

${platform.operator.name}::::

true

false

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Sentinel IP-SM-GW Version 3.1.0