SIP gateway in REG housing for VT100 door intercom system, for DIN rail mounting (TS35, 4TE). Enables a classic telephone conversation (without app, no video) on mobile, landline or internal devices. Requires an IP telephone system with SIP function, e.g. FRITZ!Box 7490, alternatively a router and an external SIP provider. 3-wire connection to the VT100 system via screw terminals or RJ-45 socket. RJ-45 Ethernet connection to the router. Compatible with door intercoms from generation VT100Tx2. Up to four telephone numbers can be dialed automatically one after the other after pressing an assigned call button. During the telephone conversation, the door opener can be controlled and a special function carried out by pressing a button. Dialing delay, call duration and maximum call time can each be set from 0 to 240 seconds. Configuration via browser (Firefox or IE) over the network. Network and SIP knowledge is required for configuration. Power supply 15V DC, max. 500mA from system power supply. Dimensions: 70 x 91 x 59mm.