The first step in joining SCDP is to pick a prefix. This is as simple as adding an entry to the table on the main page and self-assigning a prefix that does not conflict with those already listed. It is recommended that you create a page for yourself so you can share details about your network.

After you've picked a prefix, you will want to choose at least one trunking technology to use for SCDP. Trunking technology support varies among participants, but the following are used in varying degrees:

VPN tunnel required

This trunking method requires a Cisco Integrated Services Router or similar that can support a Channelized T1/E1 Circuit Emulation Module like the NM-CEM-4TE1. This is a close as we can get to a “TDM” trunking experience. However, it does require that you also establish IP peering with the network via VPN tunnel (WireGuard is most common, but other technologies can be supported if needed) and, preferably, BGP.

VPN tunnel required

This is the preferred trunking method if you have a Cisco Integrated Services Router or other H.323 capable device in your voice network. This is simpler than CEMoIP but is very similar signalling wise to Q.931. However, it does require that you also establish IP peering with the network via VPN tunnel (WireGuard is most common, but other technologies can be supported if needed) and, preferably, BGP.

VPN tunnel NOT required, but is less fun

If you do not have a device that will speak H.323 or do not want to dive into CEMoIP stuffs, IAX2 is the simplest way (though argubly the least “fun”) to trunk with the network.

Last resort, details TBD

TBD