SS7 Configuration

TANDBERG3G3GGatewayateway

USERUSERGUIDEGUIDE

Select SS7 to access the SS7

Configuration pane.

Link Set Details

A link is a time slot within a trunk used for signalling. Link sets are typically used for signalling fail-over purposes to one switch.

Enabled. Checking this box ena- bles at least one signalling link in a link set.

Destination Point Code. Uniquely identifies the destination signal- ling point of the link. This can dif- fer from the DPC of the trunk, e.g. the DPC of a Signalling Transfer Point (STP), see example 2 on the following pages.

Enabled. Link1 is checked by default. Whereas, a second link box can be checked to define an extra signalling link for fail- over purposes.

Trunk. Number of the trunk (1–4) in which a time slot is reserved for signalling.

Time slot. Number of the time slot, within aforementioned trunk, reserved for signalling.

SLC. A Signalling Link Code is a unique link number provided by the network operator to identify a link.

Routes

Routes are typically used for signalling fail-over purposes via multiple switches.

Destination Point Code. Unique identifier indicating the destination signalling point of a trunk.

Priority. Priority level of the route to the destination signalling point. Fail-over signalling paths will be followed according to this priority.

Link set. Indicates the link to the destination signalling point according to the above mentioned priority setting. When set to off the respective route is disabled.

General

Originating Point Code (OPC). A number in the range 0–214, which uniquely identifies a signalling point, in this case the 3G Gateway, within a telephone network. This number consists of three parts, viz. a network, cluster and member number, and will be provided by the network operator.

Network indicator. A two bit data field within the Service Information Octet of the Message Signal Unit that permits discrimination between national and international messages.

Audio Codec / Law. Either ALAW or ULAW. An a-law algorithm is a standard companding, i.e. compressing and expanding, algorithm, used in European digital communication systems to optimize, i.e. modify, the dynamic range of an analogue signal for digitizing. The µ-law algorithm is similar to a-law and used in North American and Japanese systems.

Trunks

A maximum of four PRIs or SS7 trunks, i.e. cables carrying E1/T1, can be enabled in the 3G Gateway.

Mode. Enable or disable a trunk.

Destination Point Code (DPC). Uniquely identifies the destination signalling point of the trunk. It will be provided by the network operator.

CIC. The Circuit Identification Code is a unique identifier for a data time slot in a cable (trunk). In this case the CIC acts as base address and can be defined for each SS7 trunk and sets the first time-slot number of the respective SS7 trunk.

To provide a better understanding of the settings discussed here, two examples are given on the following pages.

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TANDBERG D13841.08 manual SS7 Configuration, Configuration pane Link Set Details, Routes, Trunks

D13841.08 specifications

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