ISDN Switches¶

ISDN Switches (or ISDN exchanges) were digital telephony exchanges supporting the ISDN protocol.

All major manufacturers of telephony switching equipment produced ISDN-capable switches at some point. In Germany, Alcaltel S12 and Siemens EWSD were the two widely deployed ISDN switches.

Preserved digital telephony switches (mostly ISDN capable)¶

Further reading¶

• Alcatel System 12
• Siemens EWSD
  • EWSD Architecture
  • EWSD Components
    • EWSD BCM
    • EWSD CCGB
    • EWSD CCGD
    • EWSD CDEX
    • EWSD CG-MUX
    • EWSD CG11A
    • EWSD CMYC
    • EWSD CMYM
    • EWSD COM-SYPC
    • EWSD DLUS-30A
    • EWSD FHMA
    • EWSD FMTU
    • EWSD GPN-YC
    • EWSD GPN-YD
    • EWSD GPN-YE
    • EWSD IOC-CPI
    • EWSD IOC-SYPC
    • EWSD IOP-MB
    • EWSD IOP-UNI2
    • EWSD IOP-UNI3
    • EWSD IOPC
    • EWSD IOPTA
    • EWSD LAUB
    • EWSD LCMM
    • EWSD LCUB
    • EWSD LISB
    • EWSD MD-TOG
    • EWSD MDD
    • EWSD MDM
    • EWSD MH-SIMP
    • EWSD MPU-CPI
    • EWSD MTI
    • EWSD MU-CPI
    • EWSD MUX-MA
    • EWSD MUXS
    • EWSD OCE-N
    • EWSD PEX
    • EWSD PHMA
    • EWSD PIA
    • EWSD PMU-SIMP
    • EWSD RM-EA
    • EWSD SGCB
    • EWSD SILT-C
    • EWSD SILT-D
    • EWSD SIPA
    • EWSD SLMD
    • EWSD SSM-16B
    • EWSD SSM-8B
    • EWSD System Panel
    • EWSD T-RC
    • EWSD TRM-SYPC
    • EWSD TSMB
    • EWSD TXA-SYPC
  • EWSD Hacks
    • EWSD SCSI drive emulation