Motorola DDSMR64 family

UDS DDSMR64 This versatile DDSMR64 DSU/CSU supports async rates up to 57.6 kbps. Advanced MR64 DSU/CSU delivers reliable digital performance with the added benefit of high-speed async transmission.

Features & Benefits | Specifications

Two flexible versions to choose from:
  • MR64 standalone.
  • MR64 RM16M nest card for use in Data Shelf enclosures
Easy migration path to higher speeds by supporting all DDS line rates in a single unit: Async rates from 2400 bps to 57.6 kbps, and sync rates from 2400 bps to 64 kbps Clear Channel.
Added versatility to operate as a limited distance modem over unloaded twisted-pair cable, with maximum distances up to 28 miles (19 gauge wire).
Automatic line equalization ensures optimum performance and reliability in extended range applications.
Switch-configurable EIA-232 or V.35 interfaces for built-in flexibility.
Convenient 32-character LCD for easy configuration.
Fully test loop compatible with DDS MR56 and MR1.
Two-year repair/return warranty from Motorola.


Operation
Full-duplex, 1-channel, asynchronous/synchronous, point-to- point or multipoint DSU/CSU or limited distance modem (LDM) solution.
Data Rates
2.4, 4.8, 9.6, 19.2, 56, and 64* kbps. Customer Interface: Physical: DB25 (F).
Electrical
EIA-232 or V.35, user selectable, with supplied V.35 (F) adapter.
DDS Line Requirements
DATAPHONE Digital Services DDS I or DDS II.
LDM Line Requirements
19- to 26-gauge 4-wire unloaded twisted pair.
Line Interface
RJ48S
Size
7 in. (W) x 2.5 in. (H) x 9.6 in. (D); Wt.: 2.75 lbs. Power: 115 VAC; 5 Watts.
FCC Reg. #
AK3USA-21190-DE-N.
Cables Supplied
RJ48 to RJ48 (6 ft.); RJ45 to Spade Lug (8 ft.). * 64 kbps Clear Channel, sync transmission only.
DDSMR-64 Short Haul Operating Range

DATA RATE (kbps) WIRE GAUGE (Gauge) DISTANCE (k feet)
64 19 57
64 26 16
56 19 61
56 26 18
19.2 19 77
19.2 26 27
9.6 19 90
9.6 26 33
4.8 19 116
4.8 26 43
2.4 19 150
2.4 26 57