Mitel SX 200 ML PABX Instructions Guide

11 DATASET Hardware 
Flow Control 
Flow Control 
11.1 The dataset is designed to conform to the RS-232C specification. However, 
RS-232C does not define a control lead for DTE flow control of a DCE device. Several 
printer manufacturers use Pin 20 (DTR) for this purpose; others use Pin 11 and/or 
other RS-232 leads for flow control purposes. Some manufacturers force a lead high 
to indicate a flow controlled state; others force a lead low. A standard has not been 
defined. 
To fully support devices which...

Peripheral Devices 
Connecting Printers That Use RS-232 Cable Pin 4 (RTS) For Flow Control 
TO PRINTER 
Chassis Gnd 1 
TxD 2 
RxD 3 
FITS 4 
CTS 5 
DSR 6 
Signal Gnd 7 
DCD 8 
DTR 20 TO DATASET 
1 Chassis Gnd 
2 TxD 
3 RxD 
25 HW Flow Control / RI In 
5 CTS 
6 DSR 
7 Signal Grid 
8 DCD 
20 DTR 
Connecting Printers That Use RS-232 Cable Pin 11 For Flow Control 
TO PRINTER 
TO DATASET 
Chassis Gnd 1 1 Chassis Gnd 
TxD 2 2 TxD 
RxD 3 3 RxD 
RTS 4 4 RTS 
CTS 5 5 CTS 
DSR 6 6 DSR 
Signal Gnd 7 7 Signal Grid...

12 Music-on-Hold/Pager 
Unit 
General Description 
12.1 The Music-On-Hold/Pager unit interfaces a standard SX-,200 ML DNIC port to the fol- 
lowing external equipment: 
9 External music source for Music-on-Hold 
l External paging amplifier (with or without answerback capability) 
9 Up to two night bells 
l An external alarm 
The unit is powered by the SX-200 ML PABX and does not require a separate power 
source. A single 25 pair amphenol connects to the SX-200 ML PABX via the main 
distribution frame. A...

Peripheral Devices 
Table 12-l Music-On-Hold/Pager Unit LED Indicator 
Indication Status 
OFF 
No power from SX-200 ML PABX DNIC 
Flashing (2 Hz - On 250 ms, Loss of synchronization with SX-200 ML PABX, the 
Off 250 ms.) 
MOH/Pager Unit may be faulty 
On Solid 
MOH/Pager Unit is operating 
Winking (2 Hz - ON 50 ms, MOH/Pager Unit is operating and the paging amplifier is be- 
Off 1 sec.) ing accessed 
Interface Technical Specifications 
MOH Input 
12.2 The MOH input is a transformer coupled input with...

Appendix A 
Loop Length 
Specifications for 
Connections to a 
Digital Line Card 
A.1 The following rules for loop lengths between the DNI Line Card within the PABX and 
SUPERSEf 400 series telephone sets, DATASETS, or SUPERCONSOLE 1000 
Attendant Console must be followed for proper operation of the device: 
Maximum loop length (twisted pair) 24 or 26 AWG see Table A-l or Table A-2 
Maximum length of quad cable (22 AWG) 50 m (I 60 ft) 
Modular Line Cord 3 m (10 ft) 
PABX Modular 
Connector Telephone,...

Peripheral Devices 
I+2 Table A-2 Loop Lengths for SUPERSE~Telephones 
Card Type Wire Gauge (AWG) Loop Length 
I 
Digital Line Card 24 1000 m (3300 ft) 
26 1000 m (3300 ft) 
Issue 1 Revision 0 March 1997  

Appendix A - Loop Length Specifications for Connections to a Digital Line Card 
NOTES 
March 1997 Issue 1 Revision 0 A-3  

Peripheral Devices 
A-4 Issue 1 
Revision 0 March 1997  

SX-200@ ML PABX 
Engineering 
Information 
TM, @ - Trademark of Mite1 Corpomtion, 
63 Copyright lW7, Mite1 Corporation. 
All rights reserved 
Printed in Canada.  

Engineering Information 
NOTICE 
The information contained in this document is believed to be accurate in all 
respects but is not warranted by Mite1 Corporation (MlTEL@). The information is 
subject to change without notice and should not be construed in any way as a 
commitment by Mite1 or any of its affiliates or subsidiaries. Mite1 and its affiliates 
and subsidiaries assume no responsibility for any errors or omissions in this 
document. Revisions of this document or new editions of it may be issued...