10Making or receiving a hands‐free telephone call1. To receive an incoming hands‐free telephone call, press the Greenphone key, on the handset’s keypad or the PTT button for a short period.A confirmation tone that the call has been answered will be heardthrough the speakerNOTE! If the PTT button is pressed for more than 2 seconds it will rejectand end the call.2. To make a hands‐free telephone call, place the handset into the cradleand dial the desired number on the handset's keypad and press thephone key.3. Adjust the speaker volume using the handset's volume control.4. Incoming audio will be heard through the speaker.Note! For best audio during an interconnect call set the volume level at 5bars or less.Call Waiting in both Hands‐free mode and with Privacy handset1. To answer an incoming call during an active call, press the PTT buttonfor a short period. This will put the current call on hold and answer theincoming call.2. A short press on the PTT will toggle between the calls.3. Pressing the PTT for more than 2 seconds will terminate the call.Charging the battery1. With the handset turned off, the car kit will charge the battery to 60%in approximately 1 hour. The charge time will be longer if the handset isoperational during charge time.2. For operator convenience, the handset’s backlight will remain on forease of viewing during low/no‐light conditions.NOTE! Batteries will charge within the temperature window of ‐10 C to+40 C (50 F to 104 F). If the battery is outside the temperature window,no charge current will be supplied to the battery.Operating SpecificationsInput voltage range: 11V dc to 32V dcOperating ambient: ‐30C to +60 C