Fragment 37 of 72 · drawer 04
Shared telephone path
An original path diagram showing why a household telephone could become an external control over a data session.
- Accession
- MW-F-037
- Representative period
- Interpretive system diagram, 1990s
- Drawer
- Diagrams & specimens
- Certainty
- high
Shared telephone path
Interpretive system diagram, 1990s
Observed surface
COMPUTER → MODEM → WALL SOCKET → LOCAL LOOP → REMOTE MODEM
TELEPHONE HANDSET ───────┘ shares the path before the wall
A lifted receiver changes the same electrical environment used by negotiation.
Implied procedure
The diagram refuses the convenient boundary around the computer.
A person elsewhere in the building occupies the path without entering the room or touching the keyboard.
Interpretive residue
Connectivity is drawn as domestic infrastructure joined to public infrastructure.
The most important branch is the one the software cannot control.
Accountability record
Evidence beneath the reconstruction.
These institutional sources support the mechanism or historical practice interpreted above. They do not contain this reconstructed record, its wording, or its invented values.
- International Telecommunication Union · 1998 Recommendation V.90: A digital modem and analogue modem pair The 56K-era specification: up to 56,000 bit/s toward the analogue subscriber and up to 33,600 bit/s in the reverse direction, under the required network conditions. Open institutional record ↗
- International Telecommunication Union · 2000 Recommendation V.8: Procedures for starting sessions of data transmission Documents the signals and exchanges used by modems to discover one another's capabilities before a high-speed session begins. Open institutional record ↗