Plug-in RTB Transmitter V90 on SPC motherboard. Encrypted EDP protocol with transmission to SPC Com software. Bidirectionality of high speed (V.90), up to 56 Kbaud. Line failure status LEDs RTB, carrier detected (CD), hooked / off-hook and normal operation. Usable as main communicator (grade 2) or backup (grades 2 or 3, with double communication path, considering IP as main). Standard protocols for grade 2 (SIA, Contact ID, etc.) and EDP for grade 3. Maximum consumption: 35 mA. Dimensions: 38 x 90 x 25 mm.