A.4.4 SRU port Specifications
SRU Ports
| Number of Ports | 5 |
|
|
| Physical Interface | female |
|
|
| Electrical Interface | RS232C, |
|
|
| Operational Interface | DCE - Full Duplex |
|
|
| Interface Settings | Asynchronous, Synchronous |
| |
|
| |||
| 1 through 5 depending on |
| ||
| Synchronous Data |
|
|
|
| Format | Transparent |
|
|
| Transmit Clocking | Software selectable per port; internal or external |
| |
| Speeds | 2.4, 4.8, 9.6, 19.2, 28.8 and 38.4 kbps |
| |
| Asynchronous Data |
|
|
|
| Format | Proprietary |
|
|
| Stop Bits | Software selectable per port; 1 or 2 |
| |
| Data Bits | Software selectable per port; 5, 6, 7 or 8 |
| |
| Parity | Software selectable per port; none, odd, even, space or mark |
| |
| Speeds | .3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8 and 38.4 kbps |
| |
| Signaling |
|
|
|
| DSR | Tied to DTR |
|
|
| CTS | Software selectable per port; on, off (tied to RTS) |
| |
| CTS delay | Software selectable per port; immediate, 30, 60 or 100 ms |
| |
| RLSD | Software selectable per port; permanently on, follows remote RTS (drop on receipt |
| |
|
| of IDLE or CGA RED) |
|
|
|
|
|
|
|
| Diagnostics & Alarms |
|
|
|
| BERT | Integral |
|
|
| Direction | Toward DTE or toward Network |
| |
| Data Patterns | Off, mark, space, 1:1, 1:7, 511, 2047 zeros |
| |
| Loopbacks |
|
|
|
| Local | Toward DTE or toward Network |
| |
|
|
|
| |
Standards Compatibility |
|
|
| |
AT&T | TR 54075 | Subrate Data Multiplexing - A Service of DATAPHONE |
| |
|
|
| Digital Service |
|
| V.28 | Electrical characteristics for unbalanced |
| |
|
|
| interchange circuits |
|
|
| X.50 Division 3 | Fundamental Parameters of a Multiplexing Scheme for the |
|
|
|
| International Interface Between Synchronous Data Networks |
|
|
|
| (note: does not support 600 bps data) |
|
|
| V.14 | Transmission of |
|
|
|
| Bearer Channels (using async to sync converters) |
|
EIA | RS 232 | Interface Between DTE and DCE Employing Serial Binary |
| |
|
|
| Data Interchange |
|
System Standards and Specifications |