5.8.3 Installing SIP Phones at a Remote SiteIf an SBC (Session Border Controller) is present on the same local network as the KX-NS500, you can installSIP phones at remote sites without needing to configure special network settings (NAT traversal, etc.).This section provides information about the procedure for connecting SIP Phones at a remote site that hasSBC hardware.When SIP phones in remote sites use the internet to communicate with the PBXs, use the HTTPS protocol forsecurity. If the connection is within a VPN and protected, you may use the HTTP protocol.Main Site (Headquarters)IP-PT SBCRouterSwitching HubKX-UT seriesSIP phoneRemote SiteRouterMain Unit* 1 Switching HubInternet: RTP packets*1 KX-NS500Note• Install the SBC in the same LAN as the KX-NS500.• A KX-NS500 can work with only one SBC. Also, multiple sites can share an SBC.• A KX-NS500 can support up to 20 remote extensions at the same time via SBC when using the HTTPSprotocol.• All the RTP packets in between the main site and the remote site is routed to the SBC for security andfor IP address conversion.• When settings of remote extensions being used at remote sites are changed at the KX-NS500 at themain site, the reflection of the changes to the remote extension may require some time due to datatransfer protocols.Programming the KX-NS500Follow the procedures below to configure remote port settings using Web Maintenance Console.NoteFor the procedures below, program WAN side IP information of the router at the main site.This information is sent to KX-UT series SIP phones at the remote site after completing all programming.For Site Property Settings1. Click Setup ® PBX Configuration ® Configuration ® Slot.2. Move the mouse pointer over System Property.A menu will be shown under the mouse pointer.3. Click Site.4. Click the SIP Extension tab.5. Click Advanced Setting for Remote SIP-MLT.Program the WAN side IP information in Setting parameters assigned to Remote SIP-MLT.260 Installation Manual5.8.3 Installing SIP Phones at a Remote Site
