Configure SIP gateway

Updated 1 month ago by Jane

Introduction of SIP Gateway

Bizphone Gateway feature helps customers to integrate Bizphone with the existing PBX / VoiceGateway. Example, user is using an analog phone system. User purchases Bizphone subscription. User wants the 2 system work smoothly together.

In this article,

  • Legacy extensions are extensions from old PBX system and ranges from 100 to 399.
  • Bizphone extensions are extensions purely setup in Bizphone subscription and range from 400 to 499.

Configure and use gateway

There are 2 approaches.

Approach 1: Do not deprecate the old system but using 2 system simultaneously

  1. Reason to choose:
    1. Save cost: Remain the PBX SIP and extension configuration. SIP gateway reduces operating costs by connecting a legacy business phone system with dynamic SIP trunking services.
    2. The existing system are too bulky to migrate.
  2. Configuration:
    1. Purchase SIP subscription(s). One analog gateway is equivalent to one SIP account.
    2. Map manually the legacy extensions (100-399) to the newly purchased SIP account.
  3. Make calls with SIP Gateway
    1. Outgoing call
      1. Call flow: Phone -> Analog gateway -> Bizphone extension
      2. Add the sip account to the SIP list at Settings > Outbound rule so that it can make calls using the rule.
      3. Otherwise, the calls are not considered as Bizphone outgoing but SIP outgoing; their logs are located at SIP app as well.
    2. Incoming call
      1. Incoming call -> Bizphone extension --> SIP gateway account (for analog gateway) --> Analog gateway -> phone
      2. Calls to the gateway extension (100-399) will be forwarded to the assigned SIP account
      3. Calls to bizphone extension (400-499) are received at the bizphone extension itself.
    3. Internal call
      1. From legacy extensions to new extensions: press the extension number
      2. From new extensions to legacy extensions: configure the dial plan as example below
        • Explanation: If the number starts with 1 and has length of 3 (i.e. 100-199), forward to SIP gateway sip1020987.
        • Result, press extension key #123, the call will reach extension 123 in the legacy system.
        • In our example, the legacy extensions range from 100 to 299, and mapped to 2 SIP accounts. The final dial plan would be

Approach 2: Purchase new Bizphone extensions

  1. Reasons to choose: to fully sync with Bizphone and other Cloud solutions. Example: it is easier to call internally when you follow this approach.
  2. Configuration:
    1. Purchase the SIP subscription(s). One analog gateway is equivalent to one SIP account.
    2. Purchase Bizphone extension, 500 extensions in total (400 extensions to map with legacy extensions and 100 new extensions)
    3. Configure SIP account on customer's analog PBX.
    4. Map the SIP account to Bizphone extension:
      1. Go to Bizphone app > Settings > SIP gateway > Choose the extension(s) > Map it with a SIP account > Apply
      2. Can choose more than one extension at the same time. Extensions that are already mapped are not listed to choose.
      3. 1 extension can be mapped to ONLY 1 sip account.
      4. 1 sip account can be mapped to MORE than 1 extension.
    5. Do not need to register 400 extensions (100-399) to device. Instead, make sure the incoming call device is Ring SIP Gateway.
Onsite support might be necessary. Contact us and help us to understand your existing system so that we can advise you further.
  1. Make calls with SIP Gateway
    1. Outgoing call
      1. Call flow: Phone -> Analog gateway -> Bizphone extension
      2. Add the sip account to the SIP list at Settings > Outbound rule so that it can make calls using the rule.
      3. Otherwise, the calls are not considered as Bizphone outgoing but SIP outgoing; their logs are located at SIP app as well.
    2. Incoming call
      1. Incoming call -> Bizphone extension --> SIP gateway account (for analog gateway) --> Analog gateway -> phone
      2. Calls to the gateway extension (100-399) will be forwarded to the assigned SIP account
      3. Calls to bizphone extension (400-499) are received at the bizphone extension itself.
    3. Internal call
      1. Press the extension key to call from extension to extension


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