Datex-L DCE » History » Version 2
laforge, 01/30/2023 12:25 PM
| 1 | 1 | laforge | h1. Datex-L DCE |
|---|---|---|---|
| 2 | |||
| 3 | 2 | laforge | Data Communications Equipment (DCE) for [[CSPDN__Datex-L]] came in different flavors. It was owned and serviced by the Telco ([[Deutsche Bundespost]]). |
| 4 | |||
| 5 | h2. User interface |
||
| 6 | |||
| 7 | The user interface could be implemented in |
||
| 8 | * X.20 |
||
| 9 | * X.20bis |
||
| 10 | * [[X21|X.21]] |
||
| 11 | * X.21bis |
||
| 12 | |||
| 13 | The synchronous X.20/X.21 interfaces were offered at a lower cost (20-30 DM per month less) than the asynchronous X.20bis/X.21bis variants, due to the simpler DCE design for synchronous networks. |
||
| 14 | |||
| 15 | Furthermore, the DCE for asynchronous interfaces had to include a keypad to allow the user to manually dial the destination subscriber. Only the synchronous X.21 interface specifies a method how the DTE could dial directly. |
||
| 16 | |||
| 17 | h2. Models |
||
| 18 | |||
| 19 | * Siemens DFG-300 with X.21bis |
||
| 20 | * Siemens DFG-9600UE-1 with X.21bis |
||
| 21 | * Siemens DFG-9600UE-2 with X.21 |
||
| 22 | |||
| 23 | 1 | laforge | {{child_pages}} |
