Technical data

Features

EN4442EN00EN_0001

Siemens

4 Features

The HiPath HG 3500 line gateway provides a unique set of features described in the following

sections.

4.1 Gateway Functionality

Each HG 3500 gateway provides TDM to IP conversion and vice versa for up to 60/120

connections simultaneously. Two versions of the card are available (60 or 120 connections

version) depending on the traffic needs of the specific application.

Up to 240 users per gateway are supported. This number depends of course on the traffic

needs of the individual users (a 60 connection GW can support 240 users with 6 C.C.S each).

4.2 Resource Management

In a real, complex IP network the available bandwidth is typically not uniform in all sectors.

The Resource Manager (RM) can administer and monitor the bandwidth for up to 800 sectors

in a given IP network.

The RM updates a cluster matrix whenever a call is setup or torn down. The matrix allows

determination whether there is a resource shortage in any of the involved sectors. Based on

the configured bandwidth and the actual bandwidth a call is either allowed to complete or

rejected.

The RM calculates real bandwidth, taking compression settings, DMC, FAX, etc. into account.

The RM includes IP trunking connections, IP clients and IP Access Points in the calculations

for the required bandwidth.

4.3 Direct Media Connections

HG 3500 gateways support Direct Media Connections (DMC also referred to as peer-to-peer)

between two IP phones or an IP phone and an IP board like another HG 3500 or HG 3575.

Payload between two DMC endpoints (DMC endpoints = IP phone, HG 3500/3575) is switched

entirely in the IP network without involvement or the TDM switching matrix. This ensures

highest quality voice and minimal delays because only a single hop (TDM to IP to TDM

conversion) is required.