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Another important function provided by the MC530 is instant messaging support. NEC has its own IM application embedded within the mobile client.

(DOS) overloads and other practices. In prior tests, we have been successful in disabling similar IP phones from other vendors but we could not cause the NEC endpoints to malfunction.

We could send and receive instant messages without having to exit the MC530 application and the screen showed the same menu as found on the NEC desk phone and PC-based softphone.

The UNIVERGE UA5200 can be best described as a next-generation attendant console. It takes to a new level the ability of console operators or groups of operators to manage call redirection. The user at the console not only has the incoming call information, but a full description of presence for the party to be reached.

The system, as tested, had two SV7000 IP PBX servers which were tested for failover resiliency. This was done by physically disconnecting the active server while placing calls. We noticed there were no calls dropped during this test and the system availability remained intact.

Additionally, we conducted failover tests on the OW5000 dual presence server. Access to the SQL database that controls presence status remained fully available even after alternately unplugging power to each of the two servers.

With two clicks, a call can be forwarded to either the recipient or any of the alternate numbers for the recipient. An email can be sent to the recipient or the call can be transferred to voicemail.

The UA5200 has the ability to record threat calls with one click, recording not only sound, but capturing detailed call information such as caller ID, time and length of call. If used to keep customer records, private information for each customer can be sorted and identified with color coding and confidentiality access rules.

Reliability, Security and Load Testing

Using a Mu-4000 Security Analyzer from Mu Dynamics and the ClearSight Analyzer, we conducted a series of security tests on the NEC

A combination of call generation tools was used







capabilities. An Empirix Hammer calls directly to the SV7000.


A modified, multi-session version of the UC700 application was run on several workstations and servers and, using an UA5200 console, random calls were made to each of the UC700 sessions. This test stressed not only call load at the IP PBX server, but also pushed presence status changes onto the OW5000 server.

Since the virtual UC700 client sessions on each workstation and server were limited to the amount of memory on each computer, a safe number of sessions were established for this test. A maximum of 300 virtual client sessions were generated on each test server and a maximum of 150 were generated on each workstation.

product suite.







permutations on protocols such as UDP, ARP, DHCP, IPV4 and SIP were sent to the SV7000. The server resisted these attacks and remained operational during the testing.

Clearsight Analyzer and WinSIP 3.0 from Touchstone Technologies were used in an attempt to intercept and modify traffic as a means of tapping into the network. These attempts failed, likely due to the thick encryption

employed on components.






Also unsuccessful were our attempts to disable the DT750 hard phones by Denial of Service

To reach a reasonable number of sessions that would use 75 percent of the SQL database server's processing power, five test servers and 17 test workstations were used. The number of sessions obtained during this test was 3,883, which consumed 81 percent of CPU utilization and over 2GB of memory. No server performance abnormalities were detected.

The UNIVERGE system was robust enough to protect against costly communication downtime due to power or network interruption. It also is capable of warding off potentially devastating security breaches and can handle very heavy call loads.

Copyright © 2008 Miercom

Enterprise Unified Communications

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