Ip Telephony (Voice Over Ip) - Siemens HiPath 3000 Service Manual

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Workpoint Clients

IP Telephony (Voice over IP)

10.6 IP Telephony (Voice over IP)
Introduction
Voice over IP (VoIP) allows voice data to be transferred over IP networks. To guarantee com-
munication between the IP telephones, they must have compatible IP communication stacks.
H.323 is the universal standard that defines the framework for Voice over IP communication
and, consequently, for the IP communication stack. Additional standards are implemented as
well.
Gateways are required for communication between IP-supported networks (LAN, Intranet, In-
ternet) and circuit-switched networks (ISDN, PSTN). A gateway is not required for "straightfor-
ward" Voice over IP communication.
The tasks performed by a gatekeeper include:
registration of IP workpoint clients:
●
– system clients, such as, optiClient 130 V5.0, optiPoint 400, optiPoint 410, optiPoint
420, optiPoint 600 (CorNet IP mode)
– H.323 clients, such as Microsoft Windows NetMeeting
setup of a connection
●
access control
●
Main features of version 5.0
Voice over IP (VoIP), that is, the transfer of voice data over IP networks, is enabled via the
HG 1500 boards in HiPath 3000.
Version 5.0 incorporates H.323 gatekeeper functions in the HiPath 3000 communication sys-
tem and in the HiPath ComScendo Service (on HiPath 5000). This means that each HiPath
3000 system with at least one HG 1500 card and each HiPath ComScendo Service forms a
separate gatekeeper zone, to which the registered IP workpoint clients also belong.
H.323 communication between networked HiPath 3000 systems (nodes) is viewed as gate-
keeper-gatekeeper communication. There is no registration between HG 1500 boards of net-
worked systems. The CorNet NQ protocol, tunneled in H.323 via Annex M1, is used.
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HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual