26
Phones
Gigaset T300 PRO / Gigaset T500 PRO / EN Master / A31008-M2212-R102-1y-7619 / admin_administration.fm / 02.12.2010
V
e
rsion 2, 06.0
8
.2010
Overwriting phone settings
For several device types, there is an option to copy the settings of the Gigaset T300 PRO /
Gigaset T500 PRO directly to the phone via the network without having to change the set-
tings on the phone.
The prerequisites for this are:
u
The phone has already been configured for the first time in Gigaset T300 PRO / Gigaset
T500 PRO and on the phone.
u
The phone's HTTP access must not be protected by a user name and/or password.
u
The corresponding SIP account must be stored on the phone's primary line, as Gigaset
T300 PRO / Gigaset T500 PRO only overwrites this line. If the SIP account is located on
another line, Gigaset T300 PRO / Gigaset T500 PRO will create an additional account on
Line 1.
Fax functionality
This must be specified via
Functionality
for ATA adapters used to connect fax machines.
Advanced settings
Important
When operating external phones, several ports in the firewall that protect the local
network from Internet access (not the firewall for the Gigaset T300 PRO / Gigaset T500
PRO server) must be enabled. The following ports are affected: 5060 UDP and 10000-
20000 UDP (for SIP and RTP), 4569 UDP (for the IAX protocol).
NAT
If the phone is not part of the local network,
nat
must be changed to
yes
to
allow the transfer of voice information via firewall/router.
Codecs
Codecs convert analogue (voice) information into digital data and vice versa
(encoding and decoding). One or more codecs may be assigned to the
phone. You must enter multiple codecs as comma-separated values, e.g.,
alaw,ulaw,gsm
.
Although Gigaset T300 PRO / Gigaset T500 PRO supports many of the com-
monly used codecs, we recommend using the codecs G.711 alaw and ulaw.
G.711 has the best voice quality (comparable to ISDN) and a minimal delay of
2ms. However, it does require a (relatively) high bit rate of up to 84 kbit/s. In
comparison, codes such as G.729 only require a bit rate of 8 kbit/s but have a
delay of between 25 and 35 ms.
To use a device for video telephony, you will also require the appropriate
codec h263 or h263p.
If you wish the phone to transfer voice and video data, you must enter the
voice codec first followed by the video codec.
Example:
alaw,ulaw,h263p
restr. to IP
restr. to IP
limits operation of the phone to the specified IP address.