Topology
You can create a FortiVoice LSG topology by using Multiprotocol Label Switching (MPLS), a virtual private network (VPN), or software-defined networking in a wide area network (SD-WAN). When using a VPN, you can set up VPN tunnels between the branch office and the main office to avoid configuring rules and policies for various traffic types. Calls between extensions are always routed through the main office system, so a VPN tunnel setup between branch offices is not required.
|
An office peer configuration between the central office and a branch office must be set up if you want to transfer an incoming call through a FXO or PRI gateway from a branch office extension to a central office extension. For more details on office peer, see the FortiVoice Phone System Administration Guide. |
The main office manages configuration information for the branch phones and offices. The main office has the following management functions:
- Creation of all branch office extensions: The main office pushes all branch office extensions to each branch office.
- Storage of all voicemail messages: The main office, not the branch office, stores all voicemail messages.
- Phone registration: Phones register with the FortiVoice phone system at the main office and with the FortiVoice LSG unit at the branch office.
Configuration changes required at each branch office are limited to the following settings:
- Administrator accounts
- Network configuration settings
- Outbound call routing for failover scenarios
- Branch SIP port setting. If the branch office is using a non-default SIP port, then you must make sure to include that branch SIP port setting when configuring the survivability branch management on the FortiVoice phone system at the main office.
The FortiVoice LSG solution can support the following gateways at the branch office:
-
FortiVoice Gateway GO08, a foreign exchange office (FXO) gateway. For deployment details, see the FortiVoice FXO Gateway Deployment Guide.
-
FortiVoice Gateway GS16, a foreign exchange subscriber (FXS) gateway. For deployment details, see the FortiVoice FXS Gateway Deployment Guide.
-
FortiVoice Gateway GT01 and GT02, primary rate interface (PRI) gateways. For deployment details, see the FortiVoice PRI Gateway Deployment Guide.
The following image shows a FortiVoice LSG topology example: