|
|
 |
| |
|
 |
| |
RAD
ASM-10/8 Sync/Async
Short Range Modem |
|
| |
- The ASM-10/8, Short
Range Modem, operates full or half duplex with
synchronous or asynchronous transmission format over
unconditioned dedicated lines. ASM-10/8 has an
extended range of up to 28 km (17.5 miles) and
operates at eight selectable data rates up to 19.2
kbps.
- The modem uses
conditioned differential diphase modulation (EUROCOM
Std. D1), which provides immunity to background
noise, and eliminates normal line distortion for
efficient transfer of serial data over twisted pair
cable. ASM-10/8 is coupled to the dedicated line
through isolation transformers which, in conjunction
with other circuitry, protect against AC or DC
overvoltage. The protection circuitry enables
operation even when DC is connected to the line.
- Transmit level and
impedance are independently selectable. Transmit
timing can be provided internally, or can be derived
externally from the data terminal or from the
receive signal. Receive timing is regenerated from
the data. Line communication is always synchronous.
When set to async mode, ASM-10/8 performs async to
sync conversion in compliance with ITU V.14
standard.
- ASM-10/8 features V.54
diagnostic capabilities for performing local analog
loopback, local and remote digital loopback. The
operator at either end of the line may test both
modems and the line when in the digital loopback
mode. The loopback is controlled by either front
panel pushbuttons or via Pins 18 and 21 of the
V.24/RS-232 interface. A selectable option allows
insertion of a delay into the data stream so that
the V.54 loops are not carried across the network.
- ASM-10/8 is available
as a desk-top unit or as a rack-mount card for a
19" rack. The rack can carry up to 14 of the
ASM-10/8 cards. The rack-mount card can detect and
indicate power failure on the remote stand-alone
unit. The front panel RPF indicator lights if remote
power failure occurs.
|
|
|
| |
Can't
find what you need ? Call or Email
now ! |
|
|
