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Test Bed
How we tested: The Cisco Unified Communications 520 was set up on an independent network. Multiple IP phones of five different models were
connected to the Unified 520 and Cisco Catalyst Express 520. The wired models used included the Cisco Unified IP Phone 7970G, 7961G and 7960G.
The two models of wireless phones used were the Cisco Unified Wireless IP Phone 7921G and 7920G. The PSTN cloud was simulated using a Cisco
2600 series router with FXO and FXS cards. An analog phone was connected to the FXS ports on the Cisco 2600 and a trunk connection was made
between the FXO ports. For testing, calls were placed between various combinations of wired, wireless as well as internal and external analog phones.
Features and combinations of features were exercised across all connections. Meet Me conferencing was conducted with internal and external
connections.
Overview
Miercom looked at a pre-release version of the
Cisco Unified Communications 500 Series and
the Cisco Configuration Assistant. Miercom also
looked at the Cisco Monitor Manager and Cisco
Monitor Director for VARs which will include
VoIP and infrastructure monitoring services for
the Cisco Unified Communications 500 Series in
the next release.
Physical Configuration
The Cisco Unified Communications 500 Series
incorporates a broad range of telephony and
network features in a single desktop appliance.
To ease setup, it comes with a default
configuration pre-loaded. Physically the Cisco
Unified 520-8 features eight auto sensing 10/100
Ethernet ports. These ports also supply
standards based IEEE 802.3af as well as Cisco
Pre-standard PoE. The 220 watt external power
supply can support PoE devices simultaneously
on all ports. The port will automatically
recognize both Cisco and IEEE power standards
for any device connected. By utilizing an
external power supply, fan noise for the Cisco
Unified Communications 500 Series is kept to a
minimum since the cooling requirements are
greatly reduced.
Two additional 10/100 Ethernet ports are
provided for WAN uplink and expansion. The
WAN port is designed to be connected directly to
the data infrastructure or broadband modem. It
has a built in firewall as well as the ability to do
NAT. Both the firewall and NAT can be
configured and the settings can be customized
using the Cisco Configuration Assistant. The
expansion port is used to connect to additional
UC client switches for added phone ports.
Analog devices, such as fax machines, can be
connected via four integrated FXS ports. Once a
device is connected, it is automatically assigned
an extension. Calls were successfully placed
between the analog phone and IP phones on the
without any additional configuration to
accommodate the analog trunk.
PSTN connectivity is provided by four built in
analog FXO ports. Should a power failure occur;
the fourth FXS port is connected by an internal
fail-to-close switch to the first FXO port. Several
calls were placed between analog and IP phones
to the PSTN line. Again, minimal configuration
was required for the PSTN connection. Calls
were also placed successfully with the analog
phone with the Cisco Unified 520 powered off.
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