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Mobility across different subnets when using DHCP

If a WSS is not in use, and the IP address of the wireless handset has been acquired through DHCP, the wireless handset must be powered down and powered up when entering a new subnet. This enables functionality of the wireless handset when entering the WLAN RF signal coverage area of a different WLAN IP Telephony Manager 2245 group on a different subnet. Normal functionality returns once the wireless handset:

•establishes communication within the Extended Service Set ID (ESSID) of the new WLAN

•obtains another IP address from the DHCP Server

•checks in with the group master

If the wireless handset is configured to use the ESSID of the new WLAN, it automatically discovers the ESSID of the APs operating in broadcast mode.

Table 2 summarizes the roaming and handover capabilities.

Table 2 Roaming and handover capabilities summary

IP address

WSS in use

Roaming capability

Handover capability

 

 

 

 

Static

No

No

No

 

 

 

 

Static

Yes

Yes

Yes

 

 

 

 

DHCP

No

Yes, if the wireless

No

 

 

handset is

 

 

 

power-cycled between

 

 

 

subnets.

 

 

 

 

 

DHCP

Yes

Yes

Yes

 

 

 

 

Access Point

The 802.11b APs provide the connection between the wired Ethernet LAN and the wireless (802.11) LAN. APs work in all markets and must be positioned in all areas where the WLAN handsets are used. The number and placement of APs affects the coverage area and capacity of the WLAN IP Telephony system. Typically, the requirements for use of WLAN Handsets 2210/2211 are similar to those of other wireless data devices.

The APs must be SVP-compliant to support QoS. For a list of supported APs, refer to Appendix A: Compatible Access Points on page 77.

When a user on an active call is moving about, the call switches from one AP to another in the subnet. This changeover is transparent to the user.

Overview

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Nortel Networks MOG7xx, MOG6xx manual Access Point, Mobility across different subnets when using Dhcp
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MOG6xx, MOG7xx specifications

Nortel Networks was a prominent player in the telecommunications industry, known for its innovative products and solutions. Among its offerings are the MOG6xx and MOG7xx series of voice over IP (VoIP) gateways, designed to enhance and facilitate voice communications over data networks.

The MOG6xx series, which includes models like MOG660 and MOG670, was introduced to serve as a bridge between traditional telephony and modern IP-based networks. These gateways feature advanced signaling and media capabilities that make them an essential tool for businesses looking to migrate to IP telephony. The MOG6xx series supports a wide range of protocols, including SIP, H.323, and MGCP, ensuring interoperability with various systems and devices.

One of the key characteristics of the MOG6xx series is its scalability. These gateways offer flexible capacity options that allow organizations to start with a smaller investment and expand as their communication needs grow. Additionally, the MOG6xx series is designed to support numerous simultaneous calls, ensuring that businesses can operate efficiently even during peak usage times.

The MOG7xx series, including the MOG770 and MOG730 models, builds upon the foundational technologies of the MOG6xx with enhanced features and capabilities. The MOG7xx series focuses on providing higher capacity and advanced functionalities, making it particularly suitable for larger enterprises or service providers. Key features include improved echo cancellation, advanced call routing, and enhanced security protocols to protect voice data from unauthorized access.

Both the MOG6xx and MOG7xx series leverage Nortel's expertise in voice quality assurance through integrated voice processing technologies. This ensures that calls maintain high audio quality, crucial for effective communication. Additionally, these gateways support various codecs to accommodate different network conditions, further enhancing their versatility.

In terms of management, both series are equipped with user-friendly interfaces and robust diagnostic tools that enable administrators to efficiently monitor and manage voice traffic. This not only simplifies troubleshooting but also assists in optimizing network performance.

Overall, the Nortel MOG6xx and MOG7xx series provide reliable, scalable, and flexible solutions for organizations looking to integrate voice communications with their data networks. Their support for industry-standard protocols, commitment to voice quality, and advanced feature set make them standout options in the increasingly competitive landscape of VoIP gateways.
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