NEC Univerge SV8100 Features And Specifications Manual page 1104

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Call Admission Control (CAC)

The combination of WL1700 and MH240 provides Call Admission Control, which regulates addition of

new VoIP sessions on AP radios. CAC can be used to ensure VoIP sessions by limiting the number of

active voice sessions a radio can have. An AP does not permit a new voice session before ensuring

sufficient bandwidth is available.

Quality of Service (QoS)

Quality of Service (QoS) is a means of providing a level of service that will result in a network connection

of acceptable quality. Typically this results in providing different levels of service for different

applications, depending on their requirements. When data and voice are competing for bandwidth, it is

necessary to have a prioritization method that provides a controlled preference to voice packets.

WL1700-MH240 supports Layer 2 and Layer 3 classification and marking of traffic, and optimized

forwarding of traffic for voice.

Proper security provisions are critical for any enterprise Wi-Fi network. Wireless technology does not

provide any physical barrier from malicious attackers, since radio waves penetrate walls and can be

monitored and accessed from outside a facility. The extent of security measures used is typically

proportional to the value of the information accessible on the network. The security risk for Wi-Fi

telephony is not limited to the typical wired telephony concerns of eavesdropping on telephone calls or

making unauthorized toll calls, but is equivalent to the security risk of the data network that connects to

Several different security solutions can be implemented with MH240 handset. Determining the proper

level of security should be based on identified risks, corporate policy and an understanding of the pros

and cons of the available security methods.

Wired Equivalent Privacy (WEP)

The MH240 handset supports Wired Equivalent Privacy (WEP) encryption as defined by the

802.11 standard. The handset can use either 40-bit, or 128-bit key lengths. WEP is provided for

backward compatibility of a laptop, but is not recommend as a security measure for the MH240.

Wi-Fi Protected Access (WPA/WPA2)

Recognizing the need for stronger security standards beyond WEP, the IEEE developed and

ratified the 802.11i standard, which includes stronger encryption, key management, and

authentication mechanisms. Wi-Fi protected Access 2 (WPA2) is the Wi-Fi Alliance's specification

and certification program based on the 802.11i standard. WPA2 includes the Advanced Encryption

Standard (AES), which is widely accepted as one of the most powerful forms of encryption

available. WPA2 has two different authentication modes: Enterprise Mode uses 802.1x EAP-based

authentication and Personal Mode uses a pre-shared key (PSK). 802.1x authentications employ a

RADIUS authentication server and an EAP-based key exchange sequence. In the MH240 network,

it is recommended to use WPA2/PSK.

UNIVERGE SV8100

MH240 Wireless IP Telephone