Help > Functions and applications > External access
External access
The PBX is usually configured via an internal network connection. The PC you use to do this must be connected to the same network as the PBX.
Alternatively, the PBX can be configured remotely.
*Caution: Every time port forwarding is performed, there is a security risk. Therefore, only carry out remote configuration via a VPN tunnel or via the Auerswald Remote Access (ARA) Server.
*Note: A remote configuration can be started with the COMtrexx Control Center. Technically, the service runs via the Auerswald remote access (ARA) server.
Different functions such as configuration switching can, if necessary, also be proceeded using an external phone.
COMtrexx Control Center 
The COMtrexx Control Center serves as a functional extension of the PBX for resellers and system administrators. It provides remote management, control and monitoring of services and devices.
*For more information on COMtrexx Control Center, take a look at the manual of the COMtrexx Control Center. You will find it here: Manual COMtrexx Control Center.
*For more information on data exchange with the COMtrexx Control Center, take a look at the Privacy Policy of the COMtrexx Control Center. You will find this in the Internet under: Auerswald Privacy Policy.
*Important: For the proxy service, the COMtrexx requires access to the Auerproxy server. Make sure that the address and port are reachable.
*Further help under Network
*Important: To create remote backups, this function must first be set up in the PBX.
*Further help under Backup
Configuration 
•Activate the proxy service to use the COMtrexx Control Center.
−Administration > VoIP > VoIP configuration > Proxy server for Online services > Use proxy

•After request by the COMtrexx Control Center, start the requested pairing.
−Administration > Service > External access > Access for COMtrexx Control Center > Confirm access

•Allow monitoring via the COMtrexx Control Center.
−Administration > Service > External access > Access for COMtrexx Control Center > Monitoring

•Allow remote configuration via Auerswald remote access (ARA) server.
−Administration > Service > External access > Access for COMtrexx Control Center > Remote configuration via remote access server in the Internet

Switching functions on/off via an external phone 
Requirements:
•Remote switching number which is configured in the PBX
−Exchange lines > Exchange line routing > Exchange line routing incoming
•DTMF-enabled telephone or DTMF tone generator
•Knowledge of the PIN and digit sequence required for the function


1.Call the remote switching number.
The PBX automatically accepts the call.
You will hear the external confirmation tone (1 second).
2.Enter with DTMF the required digit sequence.
You will hear the external confirmation tone again.


Possible functions on an external phone:
•Switching on/off the calling of the user's mobile telephones (FMC)
*Description of operation under FMC
•Switching Follow-me on/off
*Description of operation under Follow-me
•Switching the configuration
*Description of operation under Configuration switchover
•Switching relays on/off
*Description of operation under Relays