Operating the DSU
CARRIER SLOTS
SDU | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
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| Select |
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| OK Alarm | BckUp Test EC |
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SELECT |
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| LCD DISPLAY |
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| KEY |
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| STATUS |
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| KEYPAD |
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| INDICATORS |
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OK Alarm BckUp Test | EC | Status | |
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| OK |
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| Alrm |
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| Test |
NETWORK | ERROR |
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DEVICE | CORRECTION |
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ALARM | TEST |
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DIAL |
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BACKUP | MODE |
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| 103 | TXD |
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| 104 | RXD |
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| 105 | RTS |
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| 106 | CTS |
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| 107 | DSR |
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| 108 | DTR |
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| 109 | LSD |
Front Panel
NETWORK/ DEVICE ALARM
TEST MODE
DIAL BACKUP
DTE STATUS INDICATORS
SDCP
INDICATOR
Multirate
DSU
3551496-14463-01
Figure 4-2. SDCP and Model 3551 DSU Faceplate
Both control panels have a
•Monitor the unit's health and status
•Initiate dial backup
•Initiate diagnostic tests
•Load or change the unit's configuration, or how it will operate
•Enable or disable the DSU's, DBM's, or port's transmitter
•Display or change the status of the general purpose external DTE leads.
The DCP's LCD displays the result of any command initiated from the DCP.
Refer to Appendix C to understand the meaning of DCP status indicators.
Keypad
There are seven keys on the DCP of the standalone Model 3550, and eight on the SDCP for the carrier- mounted Model 3551 DSU. The additional key, the Select key, connects the SDCP to a specific DSU located in a specific carrier and slot within the carrier.
December 1996 |
