Cisco 7941G Administration Guide - Page 83

Chapter 3 Setting Up the Cisco Unified IP Phone Installing the Cisco Unified IP Phone Cisco recommends the use of good quality external devices that are shielded (screened) against unwanted radio frequency (RF) and audio frequency (AF) signals. Depending on the quality of these devices and their proximity to other devices such as mobile phones or two-way radios, some audio noise may still occur. In these cases, Cisco recommends that you take one or more of the following actions: • Move the external device away from the source of the RF or AF signals. • Route the external device cables away from the source of the RF or AF signals. • Use shielded cables for the external device, or use cables with a better shield and connector. • Shorten the length of the external device cable. • Apply ferrites or other such devices on the cables for the external device. Cisco cannot guarantee the performance of the system because Cisco has no control over the quality of external devices, cables, and connectors. The system will perform adequately when suitable devices are attached using good quality cables and connectors. Caution In European Union countries, use only external headsets that are fully compliant with the EMC Directive [89/336/EC]. Installing the Cisco Unified IP Phone You must connect the Cisco Unified IP Phone to the network and to a power source before using it. See Figure 3-2 for a graphical representation of the connections. Note Before you install a phone, even if it is new, upgrade the phone to the current firmware image. Before using external devices, read the "Using External Devices with Your Cisco Unified IP Phone" section on page 3-6 for safety and performance information. Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.1 OL-14620-01 3-7