Configuring Remote Extensions - Auerswald COMpact 5200 Advanced Information

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Configuring Remote Extensions

In order to operate a VoIP phone as a remote extension, it must either

be connected to the network via a VPN tunnel or the phone 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.

Caution: Each port forwarding ares a security risk.

You should use as few forwarding configurations as possible.

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.

Important: For security reasons, the connection of remote extensions

by means of a VPN tunnel should be preferred.

Important: Note that when using a remote extension, emergency

calls can only be traced backed to the location of the PBX (localisation).

Localisation 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 phone or a phone connected to the local VoIP or public switched

network is required.

Note: In order to avoid that emergency calls are made from a

remote extension, the prevention of emergency calls can be enabled

under Subscriber (scr.) > Properties > Exchange line settings. When

the subscriber tries to dial an emergency number, he will hear the

COMpact 5200/5200R/5500R - Firmware V7.4A - Advanced Information V08 06/2019

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