Specifications
Table 2 lists the specifications for the Multiple Digital Messaging Unit.
Figure 9 on the next page give the Aux. Connector pin-out definitions.
Table 2 Multiple | Digital | Messaging Unit Specifications. | ||
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| Power Supply | ■ | 115 VAC, 60 Hz, or 220 VAC, 50 Hz (specified on MDMU rear panel). | |
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| Dimensions and | ■ | Height: | 1.75 inches (4.4 cm). |
| Weight | ■ | Width: | 16.25 inches (41cm) without brackets, 19 inches (48.3 cm) with brackets attached. |
■Depth: 9.25 inches (23.5 cm).
■Weight: 13 pounds (6 kg).
| Fuse Ratings | ■ | AC Power: MDL 0.25 amp Slow Blo. |
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| ■ | Battery: MDL 2.0 amp Slow Blo. |
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| Temperature | ■ | 0 to +40 deg. C. (32 to 104 deg. F.) operational. |
| Range: | ■ | |
| Humidity Range: | ■ | 5% to 95% |
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| Altitude: | ■ | Sea level to 10,000 ft. operational (1048 to 648 millibars) 40,000 ft. max. shipment. |
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| Environmental | ■ | Locate in an area free of excess moisture, corrosive gases, dust, and chemicals. |
| Battery Backup | ■ | Allows up to two hours of operation during a power failure. Total charge time 48 hours. |
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| Frequency | ■ | – 200 Hz to 3.4 kHz ( +3 dB). |
| Response |
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| Output Level | ■ | Adjustable to a maximum of |
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| Input Impedance | ■ | Handset: 220 ohm; Microphone: 600 ohms; Tape: 10K ohms. |
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| Voice Encoding | ■ | 8 KHz sampling rate, 8 bits/sample (PCM). |
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| Interconnect | ■ | 50 pin, |
| Cable |
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