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 use only hardware flow control, pin 25 may be pro- 
grammed in CDE to be used by an attached device to flow control the dataset. Pin 25 
may also be used as a Ring Indicator (RI) input to the dataset, to signal an incoming 
call when a modem is attached to the dataset. Pin 25 does not have to be explicitly 
defined in CDE as an RI input; the data set assumes this use unless the Pin 2UCTS 
flow control option is selected. This implies that hardware flow control of the dataset 
and incoming modem calls are mutually exclusive. 
The flow control options available through CDE are: 
l XON/XOFF. 
l CTS - The dataset flow controls the attached device by dropping CTS; the device 
cannot flow control the dataset. 
l None. 
. Pin 25 High/CTS 
- The attached device flow controls the dataset by raising Pjn 
25, the dataset flow controls the device by dropping CTS. 
l Pin 25 LowETS - The attached device flow controls the dataset by dropping Pin 
25, the dataset flow controls the device by dropping CTS. 
Compatibility 
Datasets supporting the new hardware flow control options are compatible with older 
versions of PABX software; however, pin 25 flow control will not be available. 
Older datasets can also be used with new PABX software; however, selecting the pin 
25 flow control options in CDE will have no effect. 
Printer Connecting Cables 
il.2 Cables which support three common methods of hardware flow control are described 
next. Data Circuit Descriptors are described in the Customer Data Entry (CDE) 
Practice of the associated PABX. 
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							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 
DCD 8 8 DCD 
11 ; 25 HW Flow Control/RI In 
DTR 20 20 DTR 
Connecting Printers That Use RS-232 Cable Pin 20 (DTR) For Flow Control 
TO PRINTER 
Chassis Gnd 1 
TxD 2 
RxD 3 
RTS 4 
CTS 5 
DSR 6 
Signal Gnd 7 
DCD 8 
DTR 20 TO DATASET 
1 Chassis Gnd 
2 TxD 
3 RxD 
4 RTS 
5 CTS 
6 DSR 
7 Signal Gnd 
8 DCD 
25 HW Flow Control / RI In 
11-2 
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							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 single LED indicator provides basic status information. The unit 
can be wall-mounted next to the SX-200 ML PABX. 
- 
Each Music-on-Hold/Pager Unit supports a single paging zone. If more than one paging 
zone is required, additional Music-on-Hold/Pager Units can be added as required. 
INTERFACE CONNECTOR EEOZO3 
LED Indicator 
Figure 12-l Music-On-Hold/Pager Unit 
The LED indicates the following states: 
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Issue 1 Revision 0 12-l  
						

							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 impedance of 600 ohms. The gain 
is fixed at -4 dB A/D. To meet signal power limits applied to such interfaces by FCC 
part 68 and Industry Canada CSO3, the audio level at the digital point will be limited to 
-15 dBm0 and the frequency response is rolled off (3 dB point) at approximately 3 
Khz. The amplitude limiting begins to affect the input signal when it exceeds approxi- 
mately 100 mVrms. Input signals should be in the range of IO to 100 mVrms. 
Paging input/Output 
The paging interface is a transformer coupled loop start trunk with an impedance of 
600 ohms. The DC termination is activated by a relay when the paging amplifier is 
being accessed. The gain is fixed at -4 dB A/D and +3 dB D/A. 
When used with an “answer back” paging amplifier, this interface must meet signal 
power limits applied to such interfaces by FCC part 68 and Industry Canada CSO3, 
the audio level at the digital point will be limited to -15 dBm0 and the frequency response 
is rolled off (3 dB point) at approximately 3 Khz. The amplitude limiting begins to affect 
the input signal when it exceeds approximately 100 mVrms, therefore, answerback 
signals should be in the range of 10 to 100 mVrms. 
Relays 
Relays are provided for Paging, Night Bells, and Alarms. The contacts are rated at 
0.1 A @I90 Vat or 0.5 A @48 Vdc. 
Paging Control Relay. Both normally open and normally closed contacts are provided 
to control the external paging amplifier. These relay contacts are switched whenever 
the paging amplifier is being accessed. 
Night Bell Relays. Two independent, normally open relays are provided to control 
external night bells. 
Alarm Relay. One normally open relay is provided to control external devices such as 
an alarm. 
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							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, Module, 
or Console 
MDF IDF 
7 
24 or 26 AWG twisted 
pair cable (see Table) 50 m maximum 
22 AWG quad 
maximum 
Table A-l Maximum Loop Lengths for Peripheral Devices 
Peripheral Maximum Loop Length 
Device Without Bridge Tap With Bridge Tap 
SUPERSET 401+ 1000 
m 1000 m 
SUPERSET 4 10 1000 m 1000 m 
SUPERSET 420 1000 m 1000 m 
SUPERSET 430 1000 m 1000 m 
DATASET 1103 
2000 m 1000 m 
DATASET 2103 
2000 m 1000 m 
SUPERCONSOLE 1000 console 1000 m 1000 m 
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							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 
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							Peripheral Devices 
A-4 Issue 1 
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							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 to 
incorporate such changes. 
ST is a registered trademark of AT&T 
SX-200, SUPERSET, SUPERSET 3, SUPERSET 4, SUPERSET 3DN, 
SUPERSET 401+, SUPERSET 410, SUPERSET 420, SUPERSET 430, 
SUPERSET DSS Module, SUPERCONSOLE 1000, LIGHTWARE and MILINK are 
trademarks or registered trademarks of Mite1 Corporation. 
Issue 1 Revision 0 March 1997