Cisco Unified IP Phone 8941 and 8945 Administration Guide for Cisco Unified Communications Manager 9.0 (SCCP and SIP)
Technical Specifications
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Technical Specifications

Technical Specifications

Physical and Operating Environment Specifications

The following table shows the physical and operating environment specifications for the Cisco Unified IP Phones 8941 and 8945.

Table 1 Physical and Operating Specifications

Specification

Value or range

Operating temperature

23° to 113°F (-5° to 45°C)

Operating relative humidity

10% to 90% (non-condensing)

Storage temperature

-13° to 176°F (-25° to 80°C)

Height

7.3 in. (18.57 cm)

Width

5.8 in. (14.79 cm)

Depth

7.1 in. (18.05 cm)

Weight

2.2 lb (1.0 kg)

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

Category 3, 5, or 5e for 10Mbps cables with 4 pairs

Category 5 or 5e for 100-Mbps cables with 4 pairs

Note   

Cables have 4 pairs of wires for a total of 8 conductors.

Distance Requirements

As supported by the Ethernet Specification, it is assumed that the maximum cable length between each Cisco Unified IP Phone and the switch is 100 meters (330 feet).

Cable Specifications

  • RJ-9 jack (4-conductor) for handset and headset connection.

  • RJ-45 jack for the LAN 10/100BaseT connection (labeled 10/100 SW on the Cisco Unified IP Phone 8941 and 8945).

  • RJ-45 jack for a second 10/100BaseT compliant connection (labeled 10/100 PC on the Cisco Unified IP Phone 8941 and 8945).

  • 48-volt power connector.

Network and Access Port Pinouts

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

  • The network port is labeled network on the Cisco Unified IP Phone.

  • The access port is labeled Computer on the Cisco Unified IP Phone.

Network Port Connector

The following table describes the network port connector pinouts.

Table 2 Network Port Connector Pinouts

Pin number

Function

1

BI_DA+

2

BI_DA-

3

BI_DB+

4

BI_DC+

5

BI_DC-

6

BI_DB-

7

BI_DD+

8

BI_DD-

Note   

BI stands for bidirectional, while DA, DB, DC and DD stand for Data A, Data B, Data C and Data D respectively.

Computer Port Connector

The following table describes the computer port connector pinouts.

Table 3 Computer (Access) Port Connector Pinouts

Pin number

Function

1

BI_DB+

2

BI_DB-

3

BI_DA+

4

BI_DD+

5

BI_DD-

6

BI_DA-

7

BI_DC+

8

BI_DC-

Note   

BI stands for bidirectional, while DA, DB, DC and DD stand for Data A, Data B, Data C and Data D respectively.

Phone Behavior During Times of Network Congestion

Anything that degrades network performance can affect Cisco IP Phone voice and video quality, and in some cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following activities:

  • Administrative tasks, such as an internal port scan or security scan

  • Attacks that occur on your network, such as a Denial of Service attack

To reduce or eliminate any adverse effects to the phones, schedule administrative network tasks during a time when the phones are not being used or exclude the phones from testing.