Auerswald COMpact 4000 Operation Manual page 596

Settings
VoIP
VoIP Provider Settings
SIP session timer (5 to 60 min.)
At the specified intervals, the SIP session timer checks whether the connection is still
present. (The PBX cannot detect whether a call connection is disrupted due to problems on the
provider side.)
Note: When the SIP session timer is switched on, this may result in the call
being interrupted more frequently after the specified interval, if a VoIP
provider has not implemented session renewal properly. In this case, you
should adjust the interval of the SIP session timer or switch it off.
Only en-bloc dialling
A connection is not set up to transmit the digits dialled here to the provider until the delay
time after the last digit is dialled has passed. All the digits are then sent as a block. Time
measurement restarts after the entry of each digit. After the selected time has passed, the PBX
recognises the most recent digit as the final digit and will not allow any more numbers to be
entered.
Notes:
En-bloc dialling is a good idea, for example, when dialling single digits causes
problems in sub-system operation.
Select as short a time as possible, because the PBX does not forward the
entire phone number to the central office until the specified time has passed.
Approximately three seconds is the default value for manual inputs.
SIPS
Requirements:
• External VoIP channel that supports SIPS (optional, see Important Information > Product
Details > Basic Assembly and Extensions section)
• A certificate for the VoIP provider stored in the PBX
This provider encrypts external connections to prevent listening in. The processes used to
set up and shut down a connection, and signalling, are all encrypted by SIPS.
Note: SRTP is used to encrypt call data.
596
Delay time after last digit dialled (3 to 15 sec.)
COMpact 4000 - Firmware V6.6A - Installation, Operation and Configuration V03 03/2016