13.8	IP Payload Switching

Introduction

IP payload switching optimizes communication between LAN-based IP workpoint clients.

In HiPath 3000 V1.2 and lower, two B-channels (with two DSP resources) in the HiPath HG 1500 and the HiPath 3000/5000-internal switching network were seized for internal network calls.

In HiPath 3000/5000 V3.0 and later, VoIP voice data (payload) is transferred directly between two IP workpoint clients in the network. When this happens, both IP workpoint clients have full access to all system features.

Payload switching is also implemented for IP networking (PBX routing).

By ceasing to use B-channels, we have managed to preserve HG 1500 resources and facilitate a higher volume of network-internal call traffic.

A B-channel is still required on the HG 1500 for connections to the following stations and lines:

•	UP0/E stations

•	Analog stations

•	ISDN stations

•	trunk and tie lines (MSI, S0, S2M)

Example: a consultation call to an optiPoint 500 telephone is set up during an existing connection between two IP workpoint clients. A HG 1500 B-channel is necessary for this consultation call.

In the case of conferences, the number of B channels seized corresponds to the number of stations and IP workpoint clients involved.

A HG 1500 DSP resource is permanently reserved for playing music-on-hold.

Example: a license was acquired for two B channels and six clients. 6 telephones were logged on. The following scenario is possible in this case: two stations can conduct an external call, while two stations are listening to Music on Hold and two stations are talking to each other.

Prerequisites

The following components are necessary for using payload switching:

•	IP telephones and clients:

-

OpenStage CorNet IP (HFA), SIP

-

optiPoint 410/420 CorNet IP (HFA), SIP

-

OpenScape Personal Edition

•	HG 1500 boards with Digital Signal Processor DSP (voice and data)

HiPath 3000/5000 V9, Service Documentation, Issue 7		up
Disclaimer & Copyright	ID: P31003H3590S100017620	2012-06-25