SS7 Configuration – Example 1

 

 

 

 

 

 

 

 

 

 

 

 

 

USERUSERGUIDEGUIDE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TANDBERG 3GGatewayateway

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Suppose all four SS7 trunks of one 3G

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gateway are connected to one switch, as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

indicated in the connection schematic to the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

right.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In this example the Originating Point Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(OPC) of the 3G Gateway equals 99, and the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Destination Point Codes (DPCs) for all trunks

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

equal 100.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Both OPC and DPC are provided by the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

telephone network operator.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

These settings can be seen in the schematic

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and in the screen shot of the SS7 window

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

below right. All trunks can carry a maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of 30 calls, i.e. 30 data time slots.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Each data time slot is identified uniquely by

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

its OPC, DPC and Circuit Identification Code

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(CIC). The “absolute” CIC consist of a CIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“base address”, which has to be defined

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

for each trunk in the SS7 window, i.e. in

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

this case 0, 32, 64 and 96, and a relative

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

address. The latter is a number between 0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and 31 and depends on the choice of the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

framing time slot and signalling time-slot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

numbers.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Since one time slot is reserved for framing,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

in this case set to time slot 0 by default, and

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

one time slot has to be defined for signalling

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(16 in this example), 30 time slots are left

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

to transport call related data, i.e. time slots

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with relative addresses 1–15 and 17–31,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

see the table in the schematic.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For signalling fail-over purposes a maximum

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

of 2 SS7 trunks, also called links, can be

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

defined to take care of the SS7 signalling of

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

all 4 trunks in the 3G Gateway,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

In this case trunks 1 and 2 are used for SS7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

signalling. Since there is a direct connection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

between the 3G Gateway and the switch,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

both links are defined in the same link set

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

with the DPC of the switch, i.e. 100. Since

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

fail-over has been arranged within one link

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set, no routes can be defined.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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D13841.08

 

 

 

 

 

 

 

33

 

 

 

 

 

 

 

 

 

 

 

10.2007

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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TANDBERG D13841.08 manual SS7 Configuration - Example, Tandberg 3GGatewayateway
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D13841.08 specifications

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