User guide

Appendix
27
Handset operating times/charging
times
The following information relates to
batteries with a capacity of 650 mAh.
The operating and charging times apply
only when using the recommended
batteries.
Please note:
When the display backlight is switched on, the
standby time of the handset is reduced to
approx. 30 hours.
Base station power consumption
Depending on current status, around
2.5 W.
General specifications
DP450 – Free software
Your DP450’s firmware contains, amongst
other things, free software that is licensed
under the GNU Lesser General Public
License. This free software was developed
by a third party and is protected by
copyright. You will find the licence text in
its original English version on the pages
that follow.
The software is provided free of charge.
You are authorised to use this free
software in accordance with the above-
mentioned licence conditions. In the
event of contradictions between these
licence conditions and the licence
conditions that apply for the software
according to Siemens Home and Office
Communication Devices GmbH & Co. KG,
the above-mentioned licence conditions
shall take precedence for the free
software.
The GNU Lesser General Public License
(LGPL) is supplied with this product. You
can also download the licence conditions
from the Internet:
The LGPL is available on the Internet at:
http://www.gnu.org/copyleft/lesser.html
The source text, including copyright
notices for free software, is currently
available on the Internet at:
http://www.siemens.com/developer/
c455ip
For further information and Internet links
to the source text of the free software, see
the Online Support pages on the Internet
at:
www.siemens.com/gigasetcustomercare
u
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Standby time approx. 170 hours (7 days)
Talktime approx. 13 hours
Charging time approx. 6 hours
Interfaces Fixed network, Ethernet
No. of channels 60 duplex channels
Radio frequency-
range
1880–1900 MHz
Duplex method Time multiplex,
10 ms frame length
Channel grid 1728 kHz
Bit rate 1152 kbit/s
Modulation GFSK
Language code 32 kbit/s
Transmission
power
10 mW, average power
per channel
Range up to 300 m outdoors,
up to 50 m indoors
Base station power
supply
230 V ~/50 Hz
Environmental
conditions in
operation
+5 °C to +45 °C;
20% to 75% humidity
Dialling mode DTMF (touch tone
dialling)/DP (dial pulsing)
Flashing time 250 ms
Codecs G711, G726, G729AB
with VAD/CNG
Quality of Service TOS, DiffServ
Protocols DECT, GAP, SIP, RTP, DHCP,
NAT Traversal (STUN),
HTTP