User's Manual

Table Of Contents
TD 92579EN
15 October 2014 / Ver. M
Installation and Operation Manual
IP-DECT Base Station & IP-DECT Gateway (software version 7.2.X)
59
4.5.13 Configure Coder
Select the preferred coder, and enter the desired fr
ame length. If exclusive is selected for
the coder the IPBS/IPBL is forced to use that coder. With Silence Compression enabled no
information is sent during pauses in the conversation, this is used to save bandwidth.
Note: Whe
n exclusive is enabled for a coder it might be impossible to make calls outside
the IP-DECT system.
1 Select DECT > System.
Note: To access the System tab, the Master
mode has to be activated, see
4.5.16 Select Mode on page 62.
2 Choose the applicable coder in the Coder drop-down list.
NOTE: The G726-32 coder is not supported by SIP.
3 Enter the sample time in milliseconds in the
Frame text field.
4 Choose Exclusive enabled or disabled by selecting/clea
ring the Exclusive check box.
5 Choose Silence Compression enabled or disabled by sele
cting/clearing the SC check
box.
6 Click "OK".
4.5.14 Secure RTP
This option makes it possible to encrypt media streams. The encryption is activated if the
SR
TP is also enabled in the IP-PBX. For additional privacy it is recommended to use the
encrypted signalling protocol (SIPS) as well to hide the exchange of the SRTP keys.
Note: If
SRTP is enabled one Radio can handle maximum 5 calls for IPBS1 and 40 calls for
IPBL (including relayed calls) at the same time. For this reason and because of the high
load on the CPU when SRTP is used, it is recommended to deactivate the Radio in the
Master.
1 Select DECT > System.
Note: To access the System tab, the Master
mode has to be activated, see
4.5.16 Select Mode on page 62.
2 To enable SRTP: Select in the Secure RTP dr
op-down list a cryptographic suite. The
numbers in the list refer to key-length/sha1 hash-length.
To disable SRTP: Select in the Secure RTP drop-down list the empty row at top.
3 Click "OK".
If a call is successfully encrypted a lock icon app
ears next to the ongoing call description in
the Traffic > Master Calls section.
4.5.15 Configure Supplementary Services
The supplementary services determine how to
handle a call if for example busy or not
answered by the user.
1 Select DECT > Suppl. Serv.
NOTE: To access the Suppl
. Serv. tab, the Master mode has to be activated, see
4.5.16 Select Mode on page 62.
2 Select the Enable Suppl
ementary Services check box to activate the supplementary
services below. The default Activate and Deactivate feature codes are preset.