Siemens Gigaset C450IP - Manual (Page 74)

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Appendix
Gigaset C450 IP / Greek eng / A31008-M1713-T151-3-8U19 / appendix.fm / 24.9.07
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Voice quality and infrastructure
With your Gigaset C450 IP you have the
possibility of making calls with good voice
quality via VoIP.
However, your phone's performance with
VoIP – and therefore the voice quality –
also depends on the properties of the
entire infrastructure.
The following VoIP provider components
are just some of the things that can influ-
ence performance:
u Router
u DSLAM
u DSL transmission line and speed
u Connection paths over the Internet
u If necessary, other applications that
also use the DSL connection
In VoIP networks, the voice quality,
amongst other things, is influenced by the
"quality of service" (QoS). If the entire
infrastructure demonstrates QoS, voice
quality is better (fewer delays, less echo-
ing, less crackling etc.).
If, for example, the router does not have
QoS, the voice quality is not as good.
Please see the specialist documentation
for further information.
Searching for service
information
You may need the service information of
your phone (base station and handset) for
Customer Services.
Base station service information
Precondition: You are conducting an
external call. The connection has been
established for at least 8 sec.
§Menu§
¢
Service Info
Confirm selection with §OK§ .
The following information is displayed:
1: Serial number of the base station (RFPI)
2: Serial number of your handset (IPUI)
3: Informs the service employees of the
base station settings (in hex diagram),
e.g. the number of registered handsets,
repeater mode. The last 4 digits indicate
the number of operating hours (hexadeci-
mal).
4: Variant, version of the firmware
(digits 3 to 5).
5: Gigaset.net number of your phone.
With this number you can call a service
employee over the Internet without need-
ing to be registered with a VoIP provider.
This means that he/she can test online
connections and VoIP telephony irrespec-
tive of the VoIP provider.
Service information of the handset
In the handset idle status:
¤
Press §Menu§ .
¤
Enter * # 0 6 #.
The following information is displayed via
the handset:
1: Serial number (IPUI)
2: Number of operating hours
3: Variant, version of handset software
Please note:
You should observe the following for good
voice quality:
– When making calls using VoIP, avoid per-
forming other Internet activities (e.g. surf-
ing the net).
– Irrespective of the codec used and the net-
work capacity utilisation, note that voice
delays can occur. Therefore, allow your
VoIP calling partner to finish speaking. Do
not interrupt him or her.