Administration HiPath 3000/5000 V7 IP systems

3000sb1.fm
Introduction For internal use only
Features
HiPath 3000/5000 7V supports the following features with ITSP connections
HiPath 3000/5000 7V can be used by standalone systems as well as networked systems to
connect to Internet telephony service providers:
● The system supports up to four simultaneously active Internet telephony service providers
(ITSP) for LCR.
Although four different Internet telephony service providers (ITSP) may be registered simultaneously,
more connections may be possible depending on bandwidth.
The maximum number of simultaneous calls is calculated based on the upstream rate and
the bandwidth required for each call (128 Kbps).
[Number of calls = upstream rate (in Kbps) / 128 Kbps]
● Up to 30 user IDs (SIP client user accounts) can be configured for Internet telephony user
connections with single-number registration.
● S 0 connections and Internet telephony connections can be used in parallel in all networking
solutions (HiPath 3000/5000 systems connected to each other or to HiPath 2000 systems)
to connect to ITSP analog lines. HiPath 3000 V6.0 SMR-9 or later supports the simultaneous
use of connections over CorNet IP and ITSP ports.
● Internet access: ADSL, SDSL: HG 1500 V3.0 is operated in the LAN behind an external
router with firewall or NAT functionality.
Points to be considered
The following issues must be considered:
● Network Address Translation (NAT) is the conversion of IP addresses in the LAN for the
Internet. NAT can be enabled and disabled in HiPath 3000/5000.
Certain services – such as VoIP or video telephony – embed subscribers’ IP addresses in
their data packets, however, instead of just noting them in the packet headers.
These services are only compatible with NAT within a VPN or require the use of additional
protocols (for example, STUN) or infrastructure components to bypass problems with NAT
(=NAT Traversal) for connections to an Internet telephony provider.
● For operation behind a router/firewall:
If an ITSP provides a STUN server for NAT traversal, none of the routers implemented supports
the "symmetric NAT" variant. The use of STUN protocols is not required and the firewall
reconfiguration is not necessary if the ITSPs perform NAT traversal over infrastructure
components in the provider network, such as, session border controllers (SBC). "SIPaware"
firewalls also feature a NAT traversal function.
● Simple Traversal of UDP over NATs (STUN)
STUN is a simple client/server-based network protocol designed to identify the existence
of NAT firewalls and routers. A central STUN client on the first HG 1500 V3.0 (signaling
gateway) connects with a STUN server at the Internet telephony service provider (ITSP).
The STUN server provides information about how the Internet connection is perceived ex-
P31003-H3570-Y100-4-7618, 2007-10-31
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