SHM-B ASYNC
1. Specifications
Transmission —
Data Rate (bps) | Distance (miles/km) |
19,200 | 1/1.6 |
9600 | 2/3.2 |
4800 | 3/4.8 |
2400 | 4/6.4 |
NOTE:The above specifications are valid for 24- or 26-AWG unshielded twisted-pair telephone cable insulated by polyethylene with a mutual capacitance of 0.083 µf/mile. Shielded twisted-pair cable will reduce the distance to one-third of the table value, due to the additional capacitance contributed by the cable’s shielding. Actual distances may vary depending on your specific operating equipment and the cable you use.
Protocol — Asynchronous
Operation — 4-wire, full duplex, point-to-point
Line Interface — Balanced current loop; Receive lines are protected through optical isolators rated at 1500 volts
Equipment Interface — EIA-232/CCITT V.24 interface with a hardware handshake (selected through use of an internal strap). Carrier Detect (CD) true (high) indicates operating short-haul modem at the remote
