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Category
Cisco IP Transfer Point Capability
Gateway screening
The ITP Gateway Screening is a process that checks the contents of an incoming/outgoing
message and either allows or rejects the message based on provisioned screening. Screening rules
are specified in tables and are applied to an inbound or outbound linkset or an application server. If
the incoming message is allowed, it is further processed. If the outgoing message is allowed, it is
routed to the specified destination.
Gateway screening tables are identified by the type of screening to be applied. Each gateway
screening table consists of two types of information:
● Screening information: screening parameters
● Structural information: next screening steps
Screening rules are chained to indicate the next screening steps. The final result is either to allow
the message for further routing or to discard the message.
Supports full traditional STP screening capability, including the MTP3- and SCCP-layer screening
using access lists for any combination of the following MSU parameters:
MTP3 screening
● Origination point code
● Destination point code
● Service indicator
● Affected PC in management messages
SCCP screening
● Called party
Global title indicator
◦
Translation type
◦
Numbering plan
◦
Nature of address indicator
◦
Encoding scheme
◦
Point code
◦
Subsystem number
◦
● Calling party
Global title indicator
◦
Translation type
◦
Numbering plan
◦
Nature of address indicator
◦
Encoding scheme
◦
Point code
◦
Subsystem number
◦
● SCCP management screening
Affected point code
◦
Affected subsystem number
◦
● ISUP
ISUP message type
◦
General screening
● Byte-pattern and offset
Multilayer routing-based screening features are also supported; see multilayer routing feature
description in table further below
SS7 load sharing
Complete MTP3 and SCCP load sharing for links, link sets, and combined link sets for any link
types
Multiple point codes
Primary, secondary, and capability point codes and M3UA/SUA routing keys: Up to 32 TDM links to
adjacent nodes
Multiple instances
The Multiple Instance feature enables multiple variant and network indicator combinations to run
concurrently on one Cisco ITP. Up to 8 instances can be configured. Each instance is a separate
domain with a defined variant, network indicator, Cisco ITP point code, optional capability point
code, and optional secondary point code.
● Instance Translation – This Cisco ITP feature enables the conversion of packets between
instances of the same variant.
● Instance Conversion – This Cisco ITP feature enables conversion between ITU and ANSI
instances for point code and global title.
Multilayer Routing (MLR) The ITP MLR feature helps enable intelligent routing of all SS7 messages at the MTP or SCCP
layer based on a flexible schema including OPC-DPC-SI and CdPa and CgPA parameters.
Additionally, MLR allows for TCAP-layer routing of SMS mobile-originated/mobile-terminated
(MO/MT) messages based on the application or service from which they originated or to which they
are destined. The MLR feature can make SMS message-routing decisions based on information
found in the TCAP, MAP, and MAP-user layers. Advanced routing capabilities are based on
parameters such as SMS A-address, B-address, destination SMSC, and origination MSC. Also
supports IS-41 SMS message routing.
Data Sheet
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