Cisco − Wireless IPT Design Guide for the Cisco 7920 IP Phone |
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Table of Contents |
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Wireless IPT Design Guide for the Cisco 7920 IP Phone | 1 |
Introduction | 1 |
Prerequisites | 1 |
Requirements | 1 |
Components Used | 2 |
Conventions | 2 |
Cisco 7920 IP Phone Overview | 2 |
WLAN Overview | 2 |
RF Overview Site Surveys and Design Recommendations | 2 |
VoIP QoS | 3 |
Security for the Cisco 7920 and WLAN Networks | 5 |
Network Sizing | 6 |
Number of 802.11b Devices per AP | 6 |
Number of 802.11b IP Phones per AP | 6 |
Numbers of 802.11b Phones per Layer 2 Subnet or VLAN | 8 |
Understanding Layer 2 and Layer 3 Roaming | 9 |
Understanding Roaming Terminology | 9 |
Layer 2 Roaming | 10 |
Layer 3 Roaming | 12 |
VLANs | 13 |
WLAN QoS for VoIP | 14 |
Interconnecting WLANs to Cisco Campus Infrastructure | 18 |
Connecting APs to the Catalyst 3550 SMI or EMI | 19 |
Connecting APs to the Catalyst 2950 EI | 20 |
Connecting APs to the Catalyst 2950 SI | 20 |
Using Cisco Emergency Responder for E911 calls with the Cisco 7920 | 20 |
Caveats and Limitations | 21 |
Call Admission Control | 22 |
Designing Around the Lack of Layer 3 Roaming | 22 |
Other Caveats and Limitations | 22 |
Related Information | 23 |
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