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Table of Contents
1 2 3
1 2 3
ON
1 2 3 4
SW A
MAIN MODULE
(FRONT CARD)
ME778C-RJ45
2W
2W
A
B
4W
4W
ON
1 2 3 4
SW B
Line: RJ-45
Line: RJ-45
Serial: 10-Pin RJ
Serial: 10-Pin RJ
JB2
1
INTERFACE MODULE
2
(REAR CARD)
3
JB4
1
2
3
JB6
1
2
3
JB7
JB5
1
2
1 2 3
3
INTERFACE
MODULE
(REAR CARD)
MODEM A
Modem-to-
Modem Line
MODEM B
MODEM A
RS-232
Serial Line
MODEM B
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Summary of Contents for Black Box ME778C-RJ45
- Page 1 ME778C-RJ45 Line: RJ-45 Line: RJ-45 INTERFACE MODULE (REAR CARD) Serial: 10-Pin RJ Serial: 10-Pin RJ INTERFACE MODULE (REAR CARD) 1 2 3 1 2 3 MODEM A Modem-to- Modem Line MODEM B 1 2 3 4 1 2 3 4...
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Page 2: Specifications
SPECIFICATIONS: Hardware Required: Cards can be installed only in MicroRacks (RM202, RM204, RM208 and RM216) Cable Required: For modem-to-modem line: Four-wire unconditioned twisted-pair, 19 to 26 AWG Interfaces: Serial: EIA/TIA-561 (compatible with EIA RS-232 and ITU-TSS [CCITT] V.24); Line: Two- or four-wire telco; Internal: Card-edge for module--MicroRack interconnection. -
Page 3: Typical Applications
CONFIGURATION: Setting the Configuration Jumpers and Switches: The Mini Driver MP card has two different sets of configuration controls. One set is on the main (front) module. The other set is on the interface (rear) module. The Jumpers and Switches on the Main Module: The Mini Driver MP card has two jumpers and four switches on its main (front) module-- a jumper and two switches for each modem as shown on the first page. - Page 4 S1 Position 4 (Unit A) and S3 Position 4 (Unit B): Receiver Squelch determines whether the corresponding modem's receiver is always on or is squelched by RTS. If receiver squelch is enabled and RTS is high, the receiver will be squelched and RD and CD will be held low. This feature is useful for 2-wire operation, because the receiver and transmitter are connected to the same pair of wires.
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Page 5: Installation
Line Interface: Line A Shield and Line B Shield (JB2 and JB4) These jumpers apply to the line interface. When one of these jumpers is in positions 1 and 2, it links RJ-45 Pins 2 and 7 on the corresponding line to the interface module's frame ground. (If you are using shielded twisted-pair cable, the shield can be connected to these pins). - Page 6 RS-232 devices you want to attach are DB25 or DB9 connectors. Even if the DTE's serial ports are RJ-45 connectors, you might still need to use a specially pinned cable. Call Black Box Technical Support with these issues, or if you want to attach a DCE device to the card.
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Page 7: Operation
Mini Driver MP Cards, you can get a custom cable from your supplier as a special quote, or you can use regular straight-through-pinned cable and repin one of the RJ connectors (that is, rearrange the wiring connections between the terminal block and the actual contacts). You might need special crimping tools or new connectors; call Black Box for these items, or for Technical Support if you have difficulty. - Page 8 Point-to-Point Application XMT+ RCV+ XMT- RCV- RCV+ XMT+ RCV- XMT- Point-to-Multipoint Application XMT+ RCV+ XMT- RCV- RCV+ XMT+ RCV- XMT- RCV+ RCV- XMT+ XMT- RCV+ RCV- XMT+ XMT-...
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