Category:Telephone switching systems
From ETHW
The different systems used by telephone operators to connect calls from one user to another
Pages in category "Telephone switching systems"
The following 28 pages are in this category, out of 28 total.
J
K
P
Media in category "Telephone switching systems"
This category contains only the following file.
- Telephone Switching Systems B Board Machine Originated Calls.jpg 612 × 489; 318 KB