Configuring Remote Extensions - Auerswald COMpact 3000 analog Operating Manual

Configuring Remote Extensions

In order to operate a VoIP telephone as a remote extension, it must either be connected to the
network via a VPN tunnel or the telephone and the PBX must establish the connection via a
publicly accessible STUN server on the Internet and a DynDNS service as described in the
following.
Important:
As a protection measure against the access by third parties, regularly check
the call data recording of your PBX and the LOGs of your NAT router for
inconsistencies.
For security reasons, the connection of remote extensions by means of a
VPN tunnel should be preferred.
Note that when using a remote extension, emergency calls can only be
traced backed to the location of the connection used (localisation). Locali-
sation is necessary if the caller is no longer able to give his name and
address. Therefore, for emergency calls from a remote extension, a mobile
telephone or a telephone connected to the public switched network is
required.
Requirements:
– VoIP channels (COMpact 3000 VoIP or VoIP channels purchased and activated in the
Upgrade Center)
– Portforwarding configured on router
Configure the PBX as follows if at least one remote extension is not coupled over a VPN tunnel:
Caution: The generation of user passwords and step 4 and 5 are essential
protection measures against the access by third parties.
1. Configure a VoIP channel as an internal VoIP channel for each remote extension
planned.
2. Create the internal telephone numbers for the remote extensions.
COMpact 3000 analog/ISDN/VoIP - Firmware V4.0 - Operating Manual V06 12/2020
Caution: Each port forwarding constitutes a security risk.
• You should use as few forwarding configurations as possible.
Settings
VoIP
Configuring Remote Extensions
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