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Insert the SIM cards into one of the four SIM holders on the 2N® VoiceBlue MAX front and make sure that the chip contacts are at the front bottom. The SIM holders are equipped with the push&pull technology for facilitation.

How to connect to the 2N® VoiceBlue MAX

  • The configuration of the 2N® VoiceBlue MAX is done via the web interface
  • In the following chart there are the factory settings for the key configuration parameters of the 2N® VoiceBlue MAX

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  • Connect the 2N® VoiceBlue Next via Ethernet cable directly to the computer. Change the IP address setting in the configuration of your PC (e.g. 192.168.1.5 and Subnet Mask 255.255.255.0)
  • Open your web browser and enter the default IP address of GSM gateway 192.168.1.2 with the default credentials (Admin/2n). If web page does not appear, then do a factory reset of the gateway with RESET button on the front panel. Press it for 10 seconds. Afterwards the gateway restarts and you can reload the page.
  • In the Gateway configuration / Ethernet configuration menu you are able to change the IP address.

How to set up the Call Routing

In the VoiceBlue MAX calls can come from the FXS Ports or from the VoIP port and calls are routed to any GSM/UMTS port according to the LCR (Least Cost Routing) table. If the GSM port is busy, other ports are checked automatically for availability (depending on the configuration) and in case if an allowed outgoing port is not available, the outgoing call will be rejected.

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If you want to check current settings of call routes, go to the Menu Gateway Configuration / LCR table

How to set up the LCR Table

The LCR (Least Cost Routing) helps you select outgoing call routes according to the port the outgoing calls is originating from (FXS, GSM oe VoIP), called subscriber's number (or some prefix), time of the day and weekdays. 

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  • Module 0 and 1 will have SIM cards from Operator 1 (Outgoing Group 1)
  • Module 2 and 3 will have SIM cards from Operator 2 (Outgoing Group 2)

Configuration of GSM outgoing groups

You are able to set up different settings for each GSM group (CLIR, free minutes, Virtual ring tone, roaming and others).

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If you want to find out more information about LCR table please go to followin FAQ: LCR table in FW 1.20 where you can find more information on how to set LCR table

How to set up connection to the opposite device (PBX)

  • For the settings of the trunk between the 2N® VoiceBlue MAX and your PBX you need to configure SIP proxy (GSM→IP) for GSM incoming calls. SIP proxy (IP→GSM) is designed for security and limitation of communication only on your PBX. You can specify the IP address and port from which SIP packets will be accepted.
  • In case you leave there 0.0.0.0 in SIP proxy (IP->GSM), the gateway will be open for traffic from all IPs. !!! This can lead to misuse of equipment by an unauthorized person !!!


Incoming calls

  • 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.
  • In the mode Accept you can define the list of called numbers which will be automatically dialed after DTMF dialing timeout in case that the customer does not press any button within the given time. From the configuration you can see 5 seconds for DTMF dialing and after that the call will be routed to the extension 100 in your PBX (if you set up SIP proxy (GSM->IP) in VoIP parameters). If you want immediate connection then set DTMF dialing timeout to 0.

SIM cards

  • In the Gateway control and module control you can see the status of the SIMs. The recommendation for quality of the signal is between -65 and -85dBm.

  • The logged SIM card is indicated by the led diode switched off on the 2N®VoiceBlue MAX

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