Safety And Performance Information; Power Outage; External Devices; Cisco Product Security - Cisco 7975G Software Manual

Preface
Although an eLearning tutorial may not be available for your specific Cisco Unified IP Phone, see the
Note
Cisco Unified IP Phone 7900 Series eLearning tutorials for an overview of the common Cisco Unified IP
Phone features and functionality.

Safety and Performance Information

The following sections provide information about the impact of power outages and external devices on your
Cisco Unified IP Phone.

Power Outage

Your accessibility to emergency service through the phone depends on the phone being powered. If there is
a power interruption, Service and Emergency Calling Service dialing will not function until power is restored.
In case of a power failure or disruption, you may need to reset or reconfigure the equipment before using the
Service or Emergency Calling Service dialing.

External Devices

Cisco recommends using good quality external devices (such as headsets), cables, and connectors 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 these 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 external devices, cables, and connectors.
In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
Caution
with the EMC Directive [89/336/EC].

Cisco Product Security

This product contains cryptographic features and is subject to United States and local country laws governing
import, export, transfer and use. Delivery of Cisco cryptographic products does not imply third-party authority
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G User Guide for Cisco Unified Communications
Safety and Performance Information
Manager 9.0 (SCCP and SIP)
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