Cisco 7921G Phone Guide - Page 13

Getting Started Power Outage Your accessibility to emergency service through the phone is dependent on the wireless access point being powered. If there is an interruption in the power supply, Service and Emergency Calling Service dialing will not function until power is restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before using the Service or Emergency Calling Service dialing. Regulatory Domains The radio frequency (RF) for this phone is configured for a specific regulatory domain. If you use this phone outside of its regulatory domain, the phone will not function properly, and you might violate local regulations. Healthcare Environments This product is not a medical device and may use an unlicensed frequency band that is susceptible to interference from other devices or equipment. Using External Devices The following information applies when you use external devices with the Cisco Unified Wireless IP Phone: Cisco recommends the use of good quality external devices (such as headsets) that are shielded 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]. Accessibility Features A list of accessibility features is available upon request. Cisco Unified Wireless IP Phone 7921G for Cisco Unified CallManager 4.1, 4.2, 5.0 and Later 5