Cisco 8845 Administration Guide

• Power over Ethernet (PoE) doesn't meet the required power-supply.
• Connected number of key expansion modules exceed maximum "Number of Units".
Solution
• Change the phone to use the same type of expansion module.
• Check the PoE the phone connected to.
• Check if the unit number is bigger than the “Number of Units".
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
121
Hardware and Accessory Installation
Key Expansion Module Does Not Go Through the Normal Start Up Process

Cisco 8845 Specifications

General

Camera	No
Audio	Wideband audio
Speakerphone	Yes
Wi-Fi	No
Display	5-inch color display
Resolution	480 x 272 pixels
Ethernet	10/100/1000 Mbps
PoE	IEEE 802.3af/at
Protocols	SIP
Codecs	G.711, G.722, G.729a, iLBC
USB Ports	2 x USB 2.0