Cisco 7821 Manual

Make a Call with a Standard Headset
Use your headset for hands-free calling that won't disturb your coworker and gives you some privacy.
Procedure
Step 1
Plug in a headset.
Step 2
Enter a number using the keypad.
Step 3
Press Headset .
Answer a Call:
Procedure
When your phone rings, press the flashing line button to answer the call.
Answer Call Waiting:
When you are on an active call, you know that a call is waiting when you hear a single beep and see the
line button flash.
Procedure
Step 1
Press the line button.
Step 2
(Optional) If you have more than one call waiting, select an incoming call.

Cisco 7821 Specifications

General

Resolution	396 x 162 pixels
Lines	2
Speakerphone	Yes
Display	3.5-inch (89 mm) monochrome display
Ethernet Ports	2 x 10/100 Ethernet ports
Power	IEEE PoE Class 1
Headset Port	Yes
Protocols	SIP
Audio Codecs	G.711, G.722, G.729, iLBC
Weight	0.9 kg (1.98 lb)