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DSI Signaling Server SGW Mode User Manual Issue 5

7.2 Signaling Configuration

7.2.1 SS7 Configuration

A Link Set (LS) is the set of signaling links between an Originating Point Code (OPC) on the Signaling

Gateway and an adjacent Destination Point Code (DPC). When specifying a link set the user can specify the

MTP type and point code size (SS7MD), the SS7 Network Identifier (NI) and the logical network (NC) it

belongs in. Link sets are managed using the C7LSx commands.

An SS7 Route (C7RT) identifies the link sets that are used to reach an eventual Destination Point Code

(DPC). Two SS7 routes cannot have the same DPC within the same network. An SS7 route utilizes link sets

(LS1 and LS2) to adjacent points to reach an eventual destination. An adjacent point can be a Signaling

Transfer Point (STP), where SS7 information is forwarded on into the SS7 network, or the eventual

destination. SS7 routes are managed using the C7RTx commands.

SS7 MTP2 Operation

An SS7 signaling link (C7LINK) processor (EQU) receives and transmits SS7 signaling information over a

timeslot (TS) on an E1 or T1 bearer or a serial V.11 interface. An SS7 Signaling link is identified uniquely

within an SS7 link set by the Signaling Link Code (SLC). Signaling links are managed using the C7SLx

commands.

Figure 6. SS7 Signaling Example

Figure 6 demonstrates a Signaling Gateway routing to two SS7 Signaling End Points (SEP). The first SEP is

reached by a pair of STPs, while the second SEP is reached directly from the Signaling Gateway. Example

MML for the above configuration is:

C7LSI:LS=1,OPC=1,DPC=2,SS7MD=ITU14,LSSIZE=2,NI=2,NC=1;

C7LSI:LS=2,OPC=1,DPC=3,SS7MD=ITU14,LSSIZE=2,NI=2,NC=1;

C7LSI:LS=3,OPC=1,DPC=4,SS7MD=ITU14,LSSIZE=2,NI=2,NC=1;

C7SLI:C7LINK=1,LS=1,EQU=2-1,TS=1-3-16,SLC=0;

C7SLI:C7LINK=2,LS=1,EQU=3-1,TS=2-3-16,SLC=1;

C7SLI:C7LINK=3,LS=2,EQU=2-2,TS=1-4-16,SLC=0;

C7SLI:C7LINK=4,LS=2,EQU=3-2,TS=2-4-16,SLC=1;

C7SLI:C7LINK=5,LS

=3,EQU=2-3,TS=3-3-16,SLC=0;

C7SLI:C7LINK=6,LS=3,EQU=3-3,TS=3-4-16,SLC=1;

C7RTI:C7RT=1,NC=1,DPC=2,LS1=1,LABEL=STP1;

C7RTI:C7RT=2,NC=1,DPC=3,LS1=2,LABEL=STP2;

C7RTI:C7RT=3,NC=1,DPC=4,LS1=3,LABEL=SEP2;

C7RTI:C7RT=4,NC=1,DPC=5,LS1=1,LS2=2,LABEL=SEP1;

Signaling

Gateway

PC 1

SEP 2

PC4

STP2

PC3

STP1

PC2

SEP 1

PC5

1 2 ... 132 133 134 135 136 137 138 139 140 141 142 ... 175 176

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