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You can use a number of accessories with your Cisco Wireless Phone 9821.

• Batteries
• Cisco Wireless Phone 9821 AC Power Adapter
• USB cable
• Cisco Wireless Phone 9821 Desktop Charger
• Cisco Wireless Phone 9821 Multi Charger
• Carry cases
• Silicon case

• Headsets:

  • Standard headsets that use a 3.5 mm jack

  • Bluetooth headsets

• Other accessories, including lanyard and battery door

The phone does not support any other type of Bluetooth device than Bluetooth headsets and speakers.

You can connect your phone to your computer or power adapter using a special USB cable.

The wide connector on the USB cable connects to the phone with magnets to hold it secure. It has pins that you must align correctly. If you hold the phone so that the screen is toward you, the battery icon on the connector is visible. For more information, see Charge phone battery.

The Cisco Wireless Phone 9821 Desktop Charger allows for the simultaneous charging of the phone and a spare battery. The charger is powered by an AC adapter and provides a 4.3 V charging output for the battery. You can secure the desktop charger with a standard laptop cable lock.

The following figure shows the desktop charger with a phone.

If your phone has a protective case, you don't need to remove the case before you charge the phone in the desktop charger. You adapt the charger to fit the phone.

You can use a USB-to-Ethernet adapter (dongle) to connect the desktop charger to the Ethernet for automatic Wi-Fi profile provisioning and certificate enrollment purposes only. Voice calls over the Ethernet network are not supported.

Built-in speakerphone and microphone

The charger includes a speakerphone and a microphone that you can use while the phone is docked. Use the phone volume buttons to control the speakerphone volume, and the Mute button on the charger itself. When the speakerphone is muted, the Mute button lights red.

Phone charging indicators

When the phone is placed in the desktop charger, the LED indicator on the top of the device displays the charging status:

• Amber—The battery is charging.

• Green—The battery is fully charged.

The phone screen provides additional feedback based on the device state:

• If the phone is powered on: A charging message appears on the screen.
• If the phone is powered off or the battery is critically low: A charging icon appears on the screen.

Spare battery charging indicators

You can charge a spare battery with the additional charging port behind the main phone charging port. When you put a spare battery into the charger, the Battery LED (to the right of the phone) lights to show the charging status:

• Amber—The spare battery is charging.

• Green—The spare battery is fully charged.

The Cisco Wireless Phone 9821 Multi Charger allows for the simultaneous charging of six phones and six spare batteries. The charger is powered by an AC adapter and provides a 4.3 V charging output for the battery. You can place the multicharger on a work surface or mount it on a wall with the wall mount kit. You can also secure the multicharger with a standard laptop cable lock.

The following figure shows the multicharger. The phones are placed in the charging ports on the left and right, and the spare batteries are placed in the center.

If your phone is in a protective case, you can charge it without removing the case.

Phone charging indicators

When the phone is placed in the desktop charger, the LED indicator on the top of the device displays the charging status:

• Amber—The battery is charging.

• Green—The battery is fully charged.

The phone screen provides additional feedback based on the device state:

• If the phone is powered on: A charging message appears on the screen.
• If the phone is powered off or the battery is critically low: A charging icon appears on the screen.

Spare battery charging indicators

You can charge up ro six spare batteries with the additional charging ports between the phone charging ports. When you put a spare battery into the charger, the Battery LED (to the left of the battery) lights to show the charging status:

• Amber—The spare battery is charging.

• Green—The spare battery is fully charged.

You can put your phone into a carry case to make it easy to carry your wireless phone and to provide some protection for the phone. When your phone is in the case, you don't have to remove the case to charge the phone.

We have the following cases available:

• Cisco Wireless Phone 9821 Leather Case

• Cisco Wireless Phone 9821 Holster Case

You can attach a Cisco Wireless Phone 9821 Silicon Clip to either case. The following picture shows the silicon clip on a leather case.

When you buy a case, we supply this clip and you can also order replacement clips.

Cisco Wireless Phone 9821 leather case

You can slide the phone into the leather case to protect the phone and then attach the case to the belt clip or pocket clip. The button on the back of the case attaches to the clip. The following pictures show the front view and back view of the leather case.

You can also clip a lanyard to the metal ring on the top of the leather case

When your phone is in the case, you don't have to remove the case to charge the phone.

Cisco Wireless Phone 9821 holster case

You can press the phone into the holster case to protect the phone and then attach the case to the belt clip or pocket clip. The button on the back of the case attaches to the case to the clip. The following pictures show the front view and back view of the holster case.

When your phone is in the case, you don't have to remove the case to charge the phone.

You can use wired and Bluetooth headsets with your phone. Although we perform some internal testing of third-party wired and Bluetooth wireless headsets for use with Cisco Wireless Phone 9821, we do not certify or support products from headset or handset vendors. Because of the inherent environmental and hardware inconsistencies in the locations where phones are deployed, there is not a single best solution that is optimal for all environments. We recommend that customers test the headsets that work best in their environment before deploying a large number of units in their network.

We recommend the use of good quality external devices, like headsets that are screened against unwanted radio frequency (RF) and audio frequency (AF) signals. Depending on the quality of these devices and their proximity to other devices such as cell phones and two-way radios, some audio noise may still occur.

For more information about the Cisco headsets that are compatible to Cisco Wireless Phone 9821, refer to the Cisco Headset Compatibility Guide.

Standard headsets

You can use a wired headset with your phone. The headset requires a 3.5 mm, 3-band, 4-connector plug.

If you plug a headset into the phone during an active call, the audio path automatically changes to the headset.

Bluetooth headsets

You can use a Bluetooth® headset with your phone. When you use a Bluetooth wireless headset, the headset usually increases battery power consumption on your phone and may result in reducing battery life.

For a Bluetooth wireless headset to work, it does not need to be within direct line-of-sight of the phone, but some barriers, such as walls or doors, and interference from other electronic devices, can affect the connection.

Headset tips

The control button on your headset can assist with switching audio paths, answering incoming calls, placing calls on hold, ending calls, and other functions. The specific behavior of the control button varies depending on the headset type and model, and therefore, detailed functionality is beyond the scope of this documentation.

Cisco Wireless Phone 9821 lanyard

You can attach the lanyard to the top of the wireless phone. The following graphic shows the lanyard.

To install the lanyard, slip the loop of cord around the bar on the back of the phone and pass the lanyard through the loop.

Cisco Wireless Phone 9821 battery door

You can replace the battery door if the IP54 gasket on the door gets damaged. If the gasket is damaged, dirt and liquids can get into the battery compartment and cause damage to the phone. Failure to replace a damaged gasket voids the phone warranty.