SwyxConnect basically consists of two functional units (applications):

The first application is the gateway. The gateway provides the functionality to make ISDN and analog calls, and serves, at the same time, as a bridge into the SIP network. Thus, calls can be forwarded per SIP from the IP network to the ISDN or analog network, and the other way around. This function is comparable to the SwyxGate. The gateway application is always active.

The second application is the SAS application (Stand Alone Survivability). It can optionally be activated and must be separately licensed. The SAS application is comparable to a SIP proxy. Provided SwyxConnect is connected via IP to SwyxWare, the SAS application will act as a pure proxy, which transparently forwards all SIP messages between the SIP endpoints. All additional functions used by SIP devices with SwyxWare are thus retained (e.g. SIP Subscribe for status messages of speed dials, MWI for Voice Box etc.). If the IP route (e.g. the VPN route) fails between SwyxWare and SwyxConnect, the SAS Application takes over the transmission between the SIP terminals automatically, i.e.SwyxConnect it provides the complete PBX functionality and transmits calls between the PSTN gateway, the SIP terminals and the ISDN or analog phones, which are connected via SIP.

As SwyxConnect is separated into two functional units, two TCP/UDP ports have to be used (one port per application).