COMpact 5000/R - Firmware V6.6A - Installation, Operation and Configuration V05 03/2016
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Settings
VoIP
Configuring Remote Extensions
Requirements:
•
Portforwarding configured on router
Configure the PBX as follows if at least one remote extension is not coupled over a
VPN tunnel:
1. Configure a VoIP channel as an internal VoIP channel for each remote extension
planned.
2. Create the internal numbers for the external private branch exchanges (a maximum
of two VoIP subscribers is recommended).
3. If required, change the automatically generated PINs and passwords (see chapter
Settings > Protection from Unauthorised Access > Configuring User PINs and
Passwords).
Note:
The user passwords are needed to authenticate the VoIP telephones
when they are registered with the PBX.
4. In dependence on the telephone tariffs, restrict the exchange line authorisation for
remote extensions (e.g.
National
). At times of the day when phone calls are usually
not made, e.g. in the night or outside of business hours, it is possible to restrict the
exchange line authorisation to a minimum (under
Subscriber (scr.) > Properties >
Exchange line settings
).
5. Configure a call restrictor (e.g. for added value services or mobile radiocommunica-
tions networks – 0900, 0180, 01…) and assign it to the remote extensions (under
Subscriber (scr.) > Properties > Exchange line settings
).
6. Enable data encryption (see SIPS and SRTP).
7. Configure the STUN server for connecting external VoIP subscribers.
8. Configure the size of the jitter buffer for the remote extensions.
9. Configure the remote extensions. To do this, you need the following information:
Caution:
The generation of user passwords and step 4 to 6 are essential
protection measures against the access by third parties.
The external IP address or URL of the PBX (as registrar and domain)
The internal number of the VoIP subscribers (as MSN or user name)
