User Guide for SIP-T42G IP Phone36• With the handset on-hook, enter the desired number using the keypad.Press , , or the Send soft key.To place a call using the headset:Do one of the following:• With the optional headset connected, press to activate the headset mode.Press the line key to obtain a dial tone.Enter the desired number using the keypad.Press , , or the Send soft key.• With the optional headset connected, press to activate the headset mode.Enter the desired number using the keypad.Press , , or the Send soft key.The SIP-T42G IP phone can handle multiple calls at a time. However, only one active call (the call that has audioassociated with it) can be in progress at any time, other calls are placed on hold. The SIP-T42G IP phone canhandle a maximum of 12 calls at one time.To place multiple calls:You can have more than one call on your SIP-T42G IP phone. To place a new call during an active call, do one ofthe following:• Press the line key. The active call is placed on hold.Enter the desired number using the keypad.Press , , or the Send soft key.• Press the Hold soft key to place the original call on hold.Press the New Call soft key.Enter the desired number using the keypad.Press , , or the Send soft key.You can press or to switch between calls, and then press the Resume soft key to retrieve the desiredcall.Answering CallsWhen you are not in another call, you can answer a call in one of three ways:• Using the handset• Using the speakerphone• Using the headset