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SAFETY WARNING

Always observe standard safety precautions during installation, operation and maintenance of
this product.  To avoid the possibility of electrical shock, be sure to disconnect the DC power
source from the DMM-4DC unit before you remove the cover or perform any repairs.

PROPRIETARY NOTICE

The information contained herein is proprietary to East Coast Datacom, Inc.  Any reproduction or
redistribution of this publication, in whole or in part, is expressly prohibited unless written
authorization is provided by East Coast Datacom, Inc.

WARRANTY NOTICE

WARRANTIES:  East Coast Datacom, Inc. (hereafter referred to as E.C.D.) warrants that its
equipment is free from any defects in materials and workmanship.  The warranty period shall be
three (3) years from the date of shipment.  E.C.D.'s sole obligation under its warranty is limited
to the repair or replacement of defective equipment, provided it is returned to E.C.D.,
transportation prepaid, within a reasonable period.  This warranty will not extend to equipment
subjected to accident, misuse, alterations or repair not made by E.C.D. or authorized by E.C.D. in
writing.

PUBLICATION NOTICE

This manual has been compiled and checked for accuracy.  The information in this manual does
not constitute a warranty of performance.  E.C.D. reserves the right to revise this publication and
make changes from time to time in the content thereof.  E.C.D. assumes no liability for losses
incurred as a result of out-of-date or incorrect information contained in this manual.

Содержание DMM-4DC

Страница 1: ...5 2 13 DCE DTE SWITCHES Page 5 2 12 NORMAL OR FORCED CLEAR TO SEND CTS PORTS 1 4 Page 5 2 11 ENABLE CONTROL PORTS 1 4 Page 4 2 10 CASCADING OR CONCATENATION Page 4 2 9 UNEXPLAINED STREAMING TERMINALS...

Страница 2: ...MIXING MODULE 48VDC POWER SUPPLY January 22 2002 Manufactured By East Coast Datacom Inc FOR TECHNICAL SUPPORT CALL East Coast Datacom Inc 245 Gus Hipp Blvd STE 3 Rockledge FL 32955 TEL 800 240 7948 or...

Страница 3: ...nt is free from any defects in materials and workmanship The warranty period shall be three 3 years from the date of shipment E C D s sole obligation under its warranty is limited to the repair or rep...

Страница 4: ...er is provided In applications where the master port and the selected port provide their own clocks data is clocked into the buffer at the receive clock rate of the active port and clocked out using t...

Страница 5: ...g switches are provided for each DTE port for isolating or removing a streaming terminal Each DTE port has its own switch and operates independently To disable a subchannel simply push the switch A ch...

Страница 6: ...TS TO CTS DELAY RTS to CTS delays of 0 5 10 and 20ms are user selectable 2 6 ANTI STREAMING 2 6 1 AUTOMATIC DTE REMOVAL The DMM 4DC incorporates circuitry that will when enabled automatically remove a...

Страница 7: ...ll other DTE s will now continue to be serviced by the DMM 4DC However you still need to fix the offending DTE or DCE device that has RTS or DCD continually raised 2 9 UNEXPLAINED STREAMING TERMINALS...

Страница 8: ...and DTE Slide BOTH switches to the same position to configure each of the RS 232 ports as a DTE or a DCE interface When set to DCE the RS 232 port MUST connect to a DTE device When set to a DTE the R...

Страница 9: ...pect the fuses Spare fuses may be obtained by calling East Coast Datacom Replacement fuse Part 714003 or by calling Little Fuse at 312 824 3024 Part 218 315 Shurter Inc at 707 778 6311 Part 034 3112 P...

Страница 10: ...more of the default settings to be changed it will be necessary to remove the top cover of the DMM 4DC Remove the DC Power source or Disconnect the DC Power before servicing the unit Removal of the t...

Страница 11: ...iming DD 115 17 X Send Timing DB 114 15 Voltage 9v 10 Voltage 9v 9 X Receive Line Detector CF 109 Signal Ground AB 102 7 X DCE Ready CC 107 6 X Clear To Send CB 106 5 X Request To Send CA 105 4 X Rece...

Страница 12: ...F OFF OFF OFF OFF OFF OFF 3 4 BAUD RATE SELECT SW11 57600 28800 14400 7200 3600 1800 900 450 5 ON OFF ON OFF ON OFF ON OFF 6 ON ON OFF OFF ON ON OFF OFF 7 ON ON ON ON OFF OFF OFF OFF 8 ON ON ON ON ON...

Страница 13: ...1 MODEM 2 MODEM 3 MODEM 4 SET TO EXTERNAL TRANSMIT CLOCK TERMINAL TIMING MODEM SLAVE SET TO RECEIVE CLOCK SLAVE CLOCK DMM 4 CLOCKING AND SIGNAL ROUTING DIAGRAM CSU DSU TERMINAL TERMINAL DIGITAL MIXIN...

Страница 14: ...4 4 USER NOTES DMM 4DC OPERATIONS MANUAL Page 11...

Страница 15: ...ows normal RTS CTS handshaking or has option for Forced CTS on Ports 1 4 JP1 JP4 RTS To CTS Delay Selectable RTS to CTS delays of 0 5 10 and 20ms Front Panel Indicators Power Transmit Data Receive Dat...

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