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3 Architecture and System Requirements
3.1 Prerequisites
3.2 Power Requirements
3.3 Network Requirements
A31003-H3150-S104-2-7620, 03/2009
HiPath 4000 V5, IP Solutions - HG 3500 & HG 3575, Service Documentation
Prior to installing IP line gateways at a customer site a network assessment is
required that will determine whether the customer's IP network is capable of
supporting IP phones. This network assessment will analyze the IP network and
determine parameters like jitter, packet loss, available bandwidth, supported
QOS mechanisms and assess overall VoIP readiness.
The HG 3500 line gateway is a standard HiPath 4000 card that plugs into
standard HiPath 4000 enclosures (AP 3300 and AP 3700 Access Points).
However, HG 3500 cards require more than average power due to components
with high power demands (DSPs). This limits the total number of HG 3500 cards
to a maximum of 6 cards per AP 3700 IP (9 slot) and 10 cards per AP 3700 (13
slot).
The HG 3500 / HiPath 4000 IPDA components place high demands on the
network via which they are coupled to their IP endpoints. Just like signaling links
between the CC and the access points, Voice-over-IP data streams are sensitive
to packet runtime, runtime variance (jitter) and packet loss.
The availability and reliability of a HG 3500 / HiPath 4000 IPDA system depends
heavily on the quality of the IP network used.
Therefore, the network must be examined prior to installation with regard to its
suitability for VoIP for the use of HG 3500 / HiPath 4000 IPDA. More details can
be found in the HiPath Network Analysis Guide.
All HiPath 4000 components must be connected to their own ports on Layer 2
switches.
Using hubs together with HiPath 4000 can cause problems. For this reason, they
are not permitted for use in corresponding VoIP scenarios. If hubs are available,
they should be replaced with a switch.
gateways_03_arch_sys_requ.fm
Architecture and System Requirements
Prerequisites
27
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