Cisco 8851 Administration Guide

• Three key expansion module (KEM) connectors which are considered as a USB connector for the Cisco
IP Phone 8851 and 8861
Network and Computer Port Pinouts
Although both the network and computer (access) ports are used for network connectivity, they serve different
purposes and have different port pinouts.
• The network port is the 10/100/1000 SW port on the Cisco IP Phone.
• The computer (access) port is the 10/100/1000 PC port on the Cisco IP Phone.
Network Port Connector
The following table describes the network port connector pinouts.
Table 2: Network Port Connector Pinouts
FunctionPin Number
BI_DA+1
BI_DA-2
BI_DB+3
BI_DC+4
BI_DC-5
BI_DB-6
BI_DD+7
BI_DD-8
BI stands for bidirectional, while DA, DB, DC, and DD stand for Data A, Data B, Data C, and
Data D respectively.
Note
Computer Port Connector
The following table describes the computer port connector pinouts.
Table 3: Computer (Access) Port Connector Pinouts
FunctionPin Number
BI_DB+1
BI_DB-2
BI_DA+3
Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide
15
About the Cisco IP Phone
Network and Computer Port Pinouts

Cisco 8851 Specifications

General

Brand	Cisco
Model	8851
Category	IP Phone
Language	English