For the setting of the trunk between the 2N® VoiceBlue Next and your PBX you need to configure SIP proxy (GSM→IP) for GSM incoming calls. SIP proxy (IP→GSM) is designed to secure communication with traffic from your CCM only. You can specify the IP address and port from which SIP packets will be accepted.
In case you leave there 0.0.0.0 it will be open for all traffic.
The GSM operator has e.g. in our country prefix 6 and 7 with nine digits in a number. The setting is below.
You need to create LCR rule for defined prefixes. The GSM group defines a way for the outgoing call routing. An appropriate SIM card is selected based on the GSM groups assignment.
You are able to set up different settings for each GSM group (CLIR, free minutes, virtual ring tone, roaming and others)
For incoming calls you can define 2 groups with the different behavior and assign them to the GSM modules. The settings are similar with GSM groups assignment for outgoing calls.
In GSM incoming groups you can define the behavior for each GSM incoming group. Choose the mode to Reject, Ignore, Accept incoming calls or Callback.
You can define the list of called numbers which will be automatically dialed after DTMF dialing timeout if the customer does not press any button within the specified time. From the configuration you can see 10 seconds for DTMF dialing and after that the call will be routed to the extension 100 to your 3CX PBX (if you set up SIP proxy (GSM->IP) in VoIP parameters).
Use the button Add Extension and fill up Extension Number and ID and Password.
Add → VOIP Provider in the menu of the 3CX PBX. Use the name of provider and choose Generic SIP Trunk. Then use the button NEXT.
specify numbers or range numbers that could be dialed from 2N® VoiceBlue Next. You can use "*" for all numbers.
specify the SIP trunk from which the number will come
specify the extension, ring group or voice mail where the call will be connected
You can register your SIP phone or download the 3CXPhone from 3CX webpage for free:
Register your SIP phone to the 3CX PBX and make an outgoing call with specified prefix to GSM via 2N® VoiceBlue Next.