Specifications

3000sb4.fm
P31003-H3560-X100-1-7618, 09/05
HiPath 3000/5000 V6.0, System Description
4-13
For internal use only
HiPath 3000/5000 in the LAN Network
HG 1500 V3.0
The H.323 communication between networked HiPath 3000 systems (nodes) must be consid-
ered as gatekeeper to gatekeeper communication. Registration between HG 1500 modules of
networked systems is not performed. The CorNet-NQ protocol, tunnelled in H.323 via annex
M1 is used.
The splitting of HG 1500 resources into signaling and payload resources is an important feature
of Version 5.0.
Signaling resources
This includes all node signaling data necessary for Voice over IP for IP-supported (LAN, intra-
net, Internet) and line-switched networks (ISDN, PSTN). These resources are centrally provid-
ed by a single HG 1500 board, the signaling gateway (= Gatekeeper HG 1500), regardless of
how many HG 1500 boards are available at the node. A HG 1500 board is defined as a gate-
keeper HG 1500 using HiPath 3000 Manager E.
Payload resources
The node resources required for transferring VoIP voice data (payload) between IP-supported
and circuit-switched networks are provided by the media gateway. One or more HG 1500
boards may be used.
Payload resources are not necessary for direct transmission between IP-supported networks.
In the case of systems with only one HG 1500 board, this board operates both as a signaling
gateway and as a media gateway when configured appropriately by HiPath 3000 Manager E.
In the case of systems with more than one HG 1500 board, payload resources are monitored
by the node-central resource manager. This is a self-configuring service. Signaling resources
are centrally provided by the first HG 1500 board. This signaling gateway also accesses other
media gateway resources (CODECs, B channels) and signaling data (for example RTP, RTCP).
This gives IP workpoint clients and other gateways access to central payload resources of all
HG 1500 boards in a node.
Resources for functions which are not based on H.323 (for example, routing channels, VCAPI
channels), are provided as before by each HG 1500 board. In systems with several HG 1500
boards, resources are provided exclusively by media gateways for performance reasons.
New features of the HG 1500 V3.0
● Transparent B channel for ISDN B channel protocols
● Flexible port number administration
● Dynamic jitter buffer
● SNTP functionality in the LAN