Cisco Systems 8961 manual Understanding the Phone Startup Process, Purpose Related Topics

Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network

Understanding the Phone Startup Process

Understanding the Phone Startup Process

When connecting to the VoIP network, the Cisco Unified IP Phone 8961, 9951, and 9971 go through a standard startup process that is described in Table 2-3. Depending on your specific network configuration, not all of these steps may occur on your Cisco Unified IP Phone.

Table 2-3	Cisco Unified IP Phone Startup Process
Task	Purpose	Related Topics
1.	Obtain power from the switch.	• Adding Phones to the Cisco
	If a phone is not using external power, the switch provides in-line power		Unified Communications Manager
			Database, page 2-9.
	through the Ethernet cable attached to the phone.
			Resolving Startup Problems,
		•
			page 12-1.
2.	(For a Cisco Unified IP Phone 9971 in a wireless LAN only) Scanning	• Interacting with Cisco Unified
	for an access point.		Wireless APs, page 6-8.
	The Cisco Unified IP Phone scans the RF coverage area with its radio.
	The phone searches its network profiles and scans for access points that
	have a matching SSID and authentication type. The phone associates
	with the access point with the highest RSSI that matches with its
	network profile.
3.	(For a Cisco Unified IP Phone 9971 in a wireless LAN only)	•	Authentication Methods,
	Authenticating with the access point.		page 6-11.
	The Cisco Unified IP Phone begins the authentication process:
	• If set for Open, then any device can authenticate to the access
	point. For added security, static WEP encryption might optionally
	be used.
	• If set to Shared Key, the phone encrypts the challenge text using
	the WEP key and the access point must verify that the WEP key
	was used to encrypt the challenge text before network access is
	available.
	• If set for LEAP or EAP-FAST, then the user name and password
	are authenticated by the RADIUS server before network access is
	available. For more information about the name and password
	authentication, see “WLAN Setup Menu” section on page 7-7.
	• If set for Auto (AKM), the phone looks for an access point with
	one of the following key management options enabled:
	– WPA, WPA2, or CCKM—The username and password are
	authenticated by the RADIUS server before network access is
	available.
	– WPA-Pre-shared key, WPA2-Pre-shared key—The phone
	authenticates with the access point using the pre-shared key.

Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 8.5 (SIP)

OL-20861-01 2-7