Difference between revisions of "DN11 Automatic Calling Unit Interface"
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==Implementation== | ==Implementation== | ||
| − | A DNll requires a custom [[system unit]] backplane and support [[printed circuit board|boards]] (the ensemble is denominated a ''''DNl1-AA'''), which can hold up to 4 independent DN11 plug-in units ('''DN11-DA'''). The DNll-AA contains: | + | A DNll requires a custom quad [[system unit]] backplane and support [[printed circuit board|boards]] (the ensemble is denominated a ''''DNl1-AA'''), which can hold up to 4 independent DN11 plug-in units ('''DN11-DA'''). The DNll-AA contains: |
* 70-08513 Wired System Unit ([[DEC part number]]) | * 70-08513 Wired System Unit ([[DEC part number]]) | ||
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* [[M105 Address Selector]] | * [[M105 Address Selector]] | ||
| − | Each DN11-DA contains: | + | Later versions included instead the later revision M7821 Interrupt Control. Each DN11-DA contains: |
| − | * M7226 Control Module | + | * M7226 Control Module ([[DEC card form factor|dual]]-width) |
| − | * | + | * BCO1R Cable Card Assembly |
{{semi-stub}} | {{semi-stub}} | ||
Revision as of 16:38, 19 July 2023
The DN11 Automatic Calling Unit Interface was a UNIBUS device which connected to, and allowed control of, a Bell 801 Automatic Calling Unit. The ACU could dial a telephone call on an attached telephone line; once the call had connected, a modem attached the the line, in parallel with the ACU, could establish a data link between the local modem and a remote modem. (A serial interface is required to connect the UNIBUS to the modem; that can be either asynchronous or synchronous.)
Registers
Each DN11 has a single control and status register. All the DN11s in a single backplane share an interrupt.
Implementation
A DNll requires a custom quad system unit backplane and support boards (the ensemble is denominated a 'DNl1-AA), which can hold up to 4 independent DN11 plug-in units (DN11-DA). The DNll-AA contains:
- 70-08513 Wired System Unit (DEC part number)
- G8000 Filter Network (+15V Supply)
- M002 Logic/Source Module
- M117 4-Input NAND Gate FLIP CHIP
- M7820 Interrupt Control
- M105 Address Selector
Later versions included instead the later revision M7821 Interrupt Control. Each DN11-DA contains:
- M7226 Control Module (dual-width)
- BCO1R Cable Card Assembly
See also
Further reading
- DN11 User Manual (EK-ODN11-OP - not online)
- DN11 Automatic Calling Unit Interface Manual (EK-ODN11-TM-002 - not online)
- DN11 Maintenance Prints (MP-DN11-00 - not online)
External links
- DN11 automatic calling unit interface manual (DEC-11-HDNAA-B-D)
