Cisco 8865 Handbuch - Seite 15

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Cisco IP Phone Accessories

Key Expansion Module Power Information

If you use a key expansion module with your IP phone, then Power over Ethernet (PoE) is enough to power

your expansion modules. But, your phone must have an IP address in order to charge the expansion module.

A power cube is needed for smartphone or tablet charging when your key expansion module is attached.

A key expansion module uses 48V DC, 5W per module. If you are charging a smartphone or a tablet, note

the following:

• Side USB: Up to 500mA/2.5W charging

• Back USB: Fast charging, Supports up to 2.1A/10.5W charging

Table 6: Power-Supply Compatibility for Cisco IP Phone 8800 Key Expansion Module

Configuration

8851 with 1 key expansion

module

8851with 2 key expansion

modules

8861 with 1 key expansion

module

8861 with 2 key expansion

modules

8861 with 3 key expansion

modules

Note

802.3af Power over Ethernet

(PoE)

Yes

• The fast-charging feature on the back USB does not work when more than one key expansion module

is attached to a Cisco IP Phone 8861 using 802.3at PoE.

• The fast-charging feature on the back USB doesn't work when more than one key expansion module is

attached to a Cisco IP Phone 8861, unless Cisco Universal PoE (UPoE) is used.

• Cisco IP Phone 8851 with 2 key expansion modules works on 802.3at PoE only with v08 or later hardware.

You can find the phone version information on the lower back of the phone as part of the TAN and PID

label. Version information is also located on the individual phone packaging.

Key Expansion Module Power Information

802.3at PoE

Yes

See the third note below

Yes

See the first note below

Yes

See the first note below

Cisco IP Phone Accessories

Cisco IP Phone Power Cube 4

Yes