Table Of Contents

Technical Specifications

Physical and Operating Environment Specifications

Network Port Pinouts

Technical Specifications

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The following sections describe the technical specifications for the Cisco Unified SIP Phone 3911.

•Physical and Operating Environment Specifications

•Network Port Pinouts

•Network Port Pinouts

Physical and Operating Environment Specifications

Table C-1 shows the physical and operating environment specifications for the Cisco Unified SIP Phone 3911.

Table C-1 Physical and Operating Specifications 

Specification	Value or Range
Operating temperature	23° to 104°F (-5° to 40°C)
Operating relative humidity	90% (+/- 5 %)
Storage temperature	Up to 140°F (60°C)
Height	200 mm
Width	180 mm
Depth	45 mm
Weight	505 g
Power	•100-240 VAC, 50-60 Hz, 0.5 A—when using the AC adapter •48 VDC, 0.2 A—when using the in-line power over the network cable
Cables	•One (2) pair of Category 3 for 10-Mbps cables or One (2) pair of Category 5 for 100-Mbps cables •RJ-9 jack (4-conductor) for handset and headset connection. •RJ-45 jack for the LAN 10/100BaseT connection. •48-volt power connector.
Distance Requirements	As supported by the Ethernet Specification, it is assumed that most Cisco Unified IP Phones should be within 330 feet (100m) of a phone closet.

Network Port Pinouts

Although both the network and access ports are used for network connectivity, they serve different purposes and have different port pinouts.

Table C-2 describes the network port connector pinouts.

Table C-2 Network Port Connector Pinouts 

Pin Number	Function
1	TD+
2	TD-
3	RD+
4	Not used
5	Not used
6	RD-
7	Not used
8	Not used