Cisco 7925G Installing Guide

headset automatically reconnects. For certain phone types that operate in power-save modes, the user may
have to “wake up” the headset by tapping on its operational button to initiate the reconnect.
Users should read the headset user guide for more information about pairing and connecting the headsets.Note
Audio Quality
Beyond the physical, mechanical, and technical performance, the audio portion of a headset must sound good
to you (the user) and to the party on the far end. Sound is subjective and Cisco cannot guarantee the performance
of any headsets, but some of the headsets on the sites listed below have been reported to perform well on
Cisco Unified IP Phones.
Nevertheless, it is ultimately the customer's responsibility to test this equipment in their own environment to
determine suitable performance.
For information about wired and Bluetooth wireless headsets for your phone, see the Cisco Unified Wireless
IP Phone 7925G, 7925G-EX, and 7926G Accessory Guide and these web sites:
• http://www.plantronics.com
• http://www.jabra.com
• http://www.jawbone.com
External Device Use
Cisco recommends the use of good quality external devices, such as speakers, microphones, and headsets 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 performs adequately when suitable devices are attached with
good quality cables and connectors.
In European Union countries, use only external headsets that are fully compliant with the EMC Directive
[89/336/EC].
Caution
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Administration Guide
16
Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G Setup
Headset Usage

Cisco 7925G Specifications

General

Keypad number of keys	12
Display diagonal	2 \
Display resolution	176 x 220 pixels
Call waiting	Yes
Lines quantity	6 lines
Voice codecs	G.711a, G.722, G.729a, iLBC
Security algorithms	128-bit WEP, SSL/TLS, WPA
Supported network protocols	DHCP, TFTP, DNS, SCCP, SRST
Input voltage	100 - 240 V
Dimensions (WxDxH)	52 x 20 x 127 mm
Minimum system requirements	Cisco Unified Communications Manager 4.1, 4.2, 4.3, 5.1, 6.0, 6.1, 7.0 + Cisco Unified Communications Manager Express 4.3 +
Input frequency	50/60 Hz
Storage temperature (T-T)	-30 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Product type	IP Phone
Product color	Gray
Safety	UL 60950, CSA 22.2 No.60950, EN 60950, IEC 60950, AS/NZS 60950, IEC 60529 (IP 54)
Certification	47 CFR 15 B ICES-003 B EN 55022 B AS/NZS CISPR 22 B CISPR 22 B VCCI B EN 61000-3-2 EN 61000-3-3 KN 22 EN 55024 EN 50082-1 EN 61000-6-1 EN 300386 EN 60601-1-2 KN
Compliance industry standards	IEEE 802.11a, IEEE 802.11b, IEEE 802.11g, IEEE 802.1X, IEEE 802.11e

Weight and Dimensions

Weight	138 g