CHAPTER
2-1
Cisco Unified Wireless IP Phone 7925G Administration Guide for Cisco Unified Communications Manager 7.0(1)
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2
Overview of the VoIP Wireless Network
This chapter provides an overview of the interaction between the Cisco Unified Wireless
IP
Phone 7925G and other key components of a VoIP network in a wireless local area network (WLAN)
environment. It contains the following sections:
• Understanding the Wireless LAN, page 2-1
• Understanding WLAN Standards and Technologies, page 2-3
• Bluetooth Wireless Technology, page 2-8
• Components of the VoIP Wireless Network, page 2-9
• Security for Voice Communications in WLANs, page 2-16
• VoIP WLAN Configuration, page 2-21
• Site Survey Verification, page 2-22
Understanding the Wireless LAN
With the introduction of wireless communication, wireless IP phones can provide voice communication
within the corporate WLAN. The Cisco
Unified Wireless IP Phone 7925G depends upon and interacts
with wireless access points (APs) and key Cisco
IP telephony components, including Cisco
Unified
Communications Manager Administration, to provide wireless voice communication.
In a traditional LAN, IP phones and computers use cables to transmit messages and data packets. Cisco
Unified WLAN delivers security, scalability, reliability, ease of deployment, and management similar
to wired LANs. It includes RF capabilities that enable real-time access to core business applications and
provides proven enterprise-class secure connectivity. The WLAN is an integrated end-to-end solution
that uses wireless IP phones and APs, network infrastructure, network management, and mobility
services.
Figure 2-1 shows a typical WLAN topology that enables the wireless transmission of voice for wireless
IP telephony.
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