Cisco Desk Phone 9851 Color Phone

Cisco lists the DP-9851-K9 as the Desk Phone 9851 with a 3.7-inch backlit color LCD at 480 x 240. It has six physical line keys and supports up to 46 line and programmable keys, plus a dedicated Calendar key. It handles up to 130 SIP lines on CUCM and Webex Dedicated Instance, and up to 16 on Webex Calling and open SIP platforms.

The 9851 has a built-in two-port Ethernet switch (10/100/1000BASE-T) with separate VLANs for phone and PC. It takes PoE at IEEE class 3, or the Cisco Power Adapter 3, sold separately. Cisco gives it one USB-A port (0.5A at 5V under PoE, 1A with the Power Adapter 3) and one USB-C port (0.5A at 5V).

There is no Bluetooth or Wi-Fi on this model; the radios appear only on the 9861 and 9871. Next to the 9841, the 9851 has a larger color screen (3.7 inch against 3.5 inch grayscale), six line keys against four, a Calendar button, and PoE class 3 against class 2. Compared with the 9861 it has fewer line keys (6 against 10), a smaller screen (5 inch on the 9861) and none of the 9861 incoming noise removal or meeting transcription features.

It supports one 9800 key expansion module, powered from its USB-A port; each module adds 20 line keys over two pages. The phone is 8.9 x 8.4 x 1.9 in (226 x 214 x 49.4 mm) and weighs 968 g. Carbon Black is DP-9851-K9= and First Light is DP-9851-L-K9=.

Browse the Cisco VoIP category or compare with the CP-8861-K9 IP Phone 8861.