Product manual
Installation instructions, Digital Trunk Unit E1 (DTU-E1) – REX-BRD0003 (2/ROFNB 157 13/6)
Technical Product Manual - DCT1800-GAP
TD 92093 (1/LZBNB 103 108 R4D) / 2006-03-09/ Ver.C
© 2006
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Fig. 32 Jumper settings DTC1 and DTC2
LEDs
Each DTC has its own LEDs:
LED1 : Normally on. Power on LED
LED2 : Normally off. Watch-dog LED (not significant)
LED3 : Normally off. Board not polled LED
LED4 : Normally off. Board error LED
14.3 Installation
1. Place the DTU-E1 firmware set PROMs and check the jumper settings (see figure 32).
Note:
Always place both PROMs, even when only one trunk is used unless it is used together with the CCS
interface. If only one trunk/channel is used together with the CCS interface, place only one PROM
because placing two PROMS will generate alarms.
2. Insert the DTU-E1 in the slides of the specified board position.
3. Gently push the board into the backplane connector till it locks. Don’t use any force.
Note:
See also chapter 24, ‘DTU cabling’.
Coax/twisted
pair jumpers
DTC1 and DTC 2
Coax (connection closed)
T
wisted pair (connection open)
Not allowed
Not allowed
105