As SCSI variants from Ultra2 onwards used differential signalling, the Macintosh DB25 SCSI interface became obsolete. The complete range of D-sub connectors also includes DA15s (one row of 7 and one of 8), DC37s (one row of 18 and one of 19), and DD50s (two rows of 17 and one of 16); these are often used in industrial products, the 15-way version being commonly used on rotary and linear encoders. The early Macintosh and late Apple II computers used an obscure 19-pin D-sub for connecting external floppy disk drives. Atari also used this connector on their 16-bit computer range for attaching hard disk drives and the Atari laser printer, where it was known as both the ACSI (Atari Computer System Interface) port and the DMA bus port. The Commodore Amiga used an equally unusual 23-pin version for both its video output and connection to an external floppy disk drive. TASCAM used DB25 connectors for their multi-track recording audio equipment (TDIF), and Logitek Audio later did the same for its broadcast consoles, though with different pinouts. Roland used DB25 connectors for their multi-track recording audio equipment (R-BUS). A few patch panels have been made which have the DB25 connectors on the back with phone jacks (or even TRS phone connectors) on the front, however these are normally wired for TASCAM, which is more common outside of broadcasting. In broadcast and professional video, "parallel digital" is a digital video interface that uses DB25 connectors, per the SMPTE 274M specification adopted in the late 1990s. The more common SMPTE 259M "serial digital interface" (SDI) uses BNC connectors for digital video signal transfer. D-SUB 37 connectors are commonly used in Hospital facilities as an interface between hospital beds and nurse call systems, allowing for the connection and signaling of Nurse Call, Bed Exit, and Cord out including TV entertainment and lighting controls. DB-25 connectors are commonly used to carry analog signals for beam displacement and color to laser projectors, as specified in the ISP-DB25 protocol published by the International Laser Display Association. There are at least seven different methods used to attach wires to the contacts in D-sub connectors. The wire wrap and IDC connections styles had to contend with incompatible pin spacing to the 0.05 inch ribbon cable or 0.1 inch proto board grid, especially for larger pin counts. The 25-pin D-sub connector is still occasionally used in recording studios for multi-channel analog audio and AES digital audio.