|PXML No. 125
APPROVAL No. NS/2164/23/G/452434
Made by Atea of Belgian and distributed in the UK by Ferranti GTE Ltd (then Ferranti Business Communications, then Siemens, then GPT then Siemens GEC Communication Systems Ltd and finally Siemens.
The S1S, S1 and S3 PABX (Private Automatic Branch Exchange) range are Electronic, Digital, Stored Program Controlled (SPC) employing Time Division Multiplexing (TDM) to establish connections and Pulse Code Modulation (PCM) for local voice transmission.
S3 cabinet to the right could hold 2 Periphery shelves (PEM's) and a control
shelf (CEM). The system could operate up to 8 PEM's. The MDF would be
mounted in a separate cabinet.
The system is modular in design, starting with a single cabinet for the smallest
configuration up to a maximum of four, each cabinet is identical in size. The system
comprises equipment cabinets, operator's consoles, test jack frames (TJF) and power supply
rectifiers and stand-by batteries (optional).
Maximum Number per PEM fully configured (8 PEM's) Extensions 256 2084 Trunks 64 512 Trunk Groups - 64 DASS2/DPNSS links 2 16 Consoles 2 16 Display Units 4 16 DTMF Receivers 8 64 8-Party Conference 2 2 Serial Data Circuits (TTY,VDU,Call Logger) - 2 MFC Receivers 8 64 Dial Tone Detectors 4 32 Data Lines 64 512
There are theoretical maximums for each item assuming the other items are provided at some reduced level or not at all. The practical maximums will be dependant upon specific customer requirements.
OMNI S3 The theoretical maximum equipment values are:- Maximum Number for a Maximum Number fully configured Equipment per PEM system of 8 PEM Extensions 256 2084 Trunks 64 512 Trunk Groups - 64 Private digital links 32 channel CEPT span 2 16 Consoles 2 16 Display Units 4 16 DTMF Receivers 8 64 8-Party Conference 2 2 Serial Data Circuits (TTY,VDU,Call Logger) - 2* MFC Receivers 8 64 Dial Tone Detectors 4 32 Data Lines 64 512 PARTS Partial parts list Description Part code PC CONSOLE PROCESSOR 8086 PROCESSOR 8086 PC CONSOLE KEYBOARD EPSON MOD NO M7US01X HARD DISK DRIVE (ST225) EC071773A +12V PWR SUPPLY CD FB017165-A COMPUTER BUS EXTEND FB017214-A PWR SUPERVISE TERM FB020995-A M502 CD FB051383-A PCM NETWORK CD FB051394-A POWER MONITOR CD FB051395-A 128K MEMORY FB051396-A SYS STATUS DISPLAY FB051397-A FLOPPY DISC ASSEMBLY EC022198A HARD DISK ASS (ST412) EC022199A FAN PACK EC071624A ICPCM FB051394-BOA E&M SIGNAL CARD EC004521-01 PEM S3 BACKPLANE EC071614A OSCI UNIT (PC CONSOLE) HC001985-A A5 REMOTE ALARM BOX E08001A THE S3 SHARES OTHER PARTS WITH THE OMNI S1 AND S1S
Last revised: September 25, 2021