GAI-Tronics LE200-RM User Manual

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Pub. 42004-392G

G A I - T R O N I C S ® C O R P O R A T I O N

A H U B B E L L C O M P A N Y

Model LE200-RM

Rack-Mount Page/Party® Line Extender

T A B L E O F C O N T E N T S

Confidentiality Notice .....................................................................................................................

1

General Information.......................................................................................................................

1

Line Extender and Sub-Component Details.........................................................................................

2

PCBA Access........................................................................................................................................................

3

Audio Termination Connection Module – Optional Model 12118-011 Kit..........................................................

4

Input/Output (I//O) Termination Connection Module – Optional Model 12118-012 Kit.....................................

5

Main PCBA...........................................................................................................................................................

6

Features and Functions..................................................................................................................

7

Page Line Audio Transmission..............................................................................................................

7

Page Line Audio Monitoring Output ....................................................................................................

8

Page Line Audio Detect Output Contact ..............................................................................................

9

Page Line FSK Data Transmission (SmartSeries Systems) ................................................................

9

Page Line 50 kHz VLC Transmission.................................................................................................

10

Page Line Ground Fault Detection......................................................................................................

10

Page Line Ground Fault Re-generation..............................................................................................

11

Page Line Ground Fault Output Contact...........................................................................................

11

Party Line Audio Transmission...........................................................................................................

12

Party Line Off-Hook Regeneration.....................................................................................................

12

Party Line Off-Hook Detection............................................................................................................

13

Audio Line Connection Relays ............................................................................................................

14

Audio Line Muting................................................................................................................................

15

Page/Party® Line Balance.....................................................................................................................

16

Contact Closure Inputs & Relay Outputs (I/0) ..................................................................................

17

Echo Cancellation .................................................................................................................................

17

Manual Initiation of Echo Canceling ..................................................................................................................

17

Data Links between Line Extenders.............................................................................................

18

T1/E1 Data Link....................................................................................................................................

18

Low Voltage Differential Signaling (LVDS) Data Link.....................................................................

18

Configuring the Data Links .................................................................................................................

19

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374 800-492-1212 Fax: 610-796-5954

VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

Table of Contents

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MODEL LE200-RM RACK-MOUNT PAGE/PARTY® LINE EXTENDER

 

T1/E1 Data Format Selection..............................................................................................................................

19

T1 Line Build-out Settings..................................................................................................................................

19

T1/E1 Receiver Equalization Gain Limit............................................................................................................

20

T1/E1 Clock Source............................................................................................................................................

20

T1/E1 Data Line Grounding ...............................................................................................................................

21

LVDS Data Link Settings ...................................................................................................................................

21

LVDS Port Indicators .........................................................................................................................................

22

Typical Data Link Settings...................................................................................................................

23

Point-to-Point Page/Party® System Connection..................................................................................................

23

Point to Multi-point Page/Party® System Connection ........................................................................................

24

Series Connection of Page/Party® System ..........................................................................................................

25

Rules for Interconnecting More than Two Model LE200-RMs..........................................................................

26

Installation ....................................................................................................................................

28

Mounting................................................................................................................................................

28

Tabletop Mounting .............................................................................................................................................

28

Wiring ....................................................................................................................................................

28

Power Connections .............................................................................................................................................

28

Page/Party® System Cable Connection...............................................................................................................

28

T1/E1 Data Connections .....................................................................................................................................

29

Contact Closure Input Connections ....................................................................................................................

30

Contact Closure Output Connections..................................................................................................................

31

Page Line Audio Monitoring Connections .........................................................................................................

33

Verifying the Proper Line Balance Resistance ...................................................................................................

34

Distributing Line Balance Resistance .................................................................................................................

34

Fiber Optic Cable Connections............................................................................................................

35

Fiber Optic Transceiver Set-Up...........................................................................................................

36

Verification of Proper Operation ........................................................................................................................

40

Summary of PC Board Connections and Settings.......................................................................

41

Recording the Settings ..................................................................................................................

45

Testing and Troubleshooting........................................................................................................

48

Generating Audio Test Signals ............................................................................................................

48

Function Testing....................................................................................................................................

49

Specifications ................................................................................................................................

50

Replacement Parts ................................................................................................................................

55

Frequently Asked Questions.........................................................................................................

56

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374 800-492-1212 Fax: 610-796-5954

VISIT WWW.GAI-TRONICS.COM FOR PRODUCTii LITERATURE AND MANUALS

PUB. 42004-392G

G A I - T R O N I C S ® C O R P O R A T I O N

A H U B B E L L C O M P A N Y

Model LE200-RM

Rack-Mount Page/Party® Line Extender

Confidentiality Notice

This manual is provided solely as an operational, installation, and maintenance guide and contains sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAITronics retains all intellectual property and other rights in or to the information contained herein, and such information may only be used in connection with the operation of your GAI-Tronics product or system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third party.

General Information

The Model LE200-RM Rack-Mount Page/Party® Line Extender is used in pairs to extend the operating distance of Page/Party®, SmartSeries or ICS Page/Party® systems. Two system cable segments are connected through the Line Extender using either a two-pair copper cable or fiber optic cable depending on the distance required. The local and remote cable segments are electrically isolated through the Line Extenders. Refer to Figure 1 for a typical block diagram.

Figure 1. Typical System Block Diagram

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374 800-492-1212 Fax: 610-796-5954

VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

MODEL LE200-RM RACK-MOUNT PAGE/PARTY® LINE EXTENDER

Pub. 42004-392G

PAGE 2 of 56

Line Extender and Sub-Component Details

Refer to Figure 2 below for dimensional information and sub-component layout of the LE200-RM Line Extender.

Figure 2. Model LE200-RM Line Extender Outline

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PCBAAccess

The Main PCBA can be easily accessed to set up switches and jumpers. Remove the two #6-32 screws from the rear of the unit. Slide the PCBA support plate and PCBA out of the unit. See Figure 3.

Figure 3. Access to the Model LE200-RM Line Extender’s Main PCBA

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AudioTerminationConnectionModule–Optional Model 12118-011Kit

The GAI-Tronics Model 12118-011 Kit must be used if the LE200-RM is to be connected directly to a Page/Party® system. This kit consists of a ribbon cable for connection to the LE200-RM, an Audio Termination Connection Module for connection to the Page/Party® system and mounting hardware. The page line and party line 1–5 conductors of the Page/Party® system cable connect to the Audio Termination Connection Module. This module also can provide the 33-ohm line balance resistance needed for the audio lines. Audio line functions are described later in this manual.

Figure 4. Audio Termination Connection Module

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Input/Output (I//O)TerminationConnectionModule–Optional Model 12118-012Kit

If the LE200-RM is to be connected directly to I/O wiring then the GAI-Tronics Model 12118-011 Kit is required. This kit consists of a ribbon cable for connection to the LE200-RM, an I/O Termination Connection Module and mounting hardware. The I/O Termination Connection Module is for connecting the control wiring needed to send contact closures across the Line Extenders. I/O features and functions are described later in this manual.

Figure 5. Input/Output (I/O) Connection Module

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GAI-Tronics LE200-RM User Manual

MODEL LE200-RM RACK-MOUNT PAGE/PARTY® LINE EXTENDER

Pub. 42004-392G

PAGE 6 of 56

MainPCBA

The Main PCBA contains all the central processing and line driver circuitry for the Line Extender. The board contains numerous connectors, switches and jumpers for setting the Line Extender operating parameters. Figure 6 below identifies the various components on the Main PCBA. Features and functions of each are described later in this manual.

Figure 6. 69443-xxx Main PCBA

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Features and Functions

The Model LE200-RM Page/Party® Line Extenders provide the following features between Page/Party® system cables.

Page Line Audio Transmission

A pair of Model LE200-RMs provides page line audio transmission between two Page/Party® system cables. This transmission is half-duplex operation.

When the Line Extender detects a peak audio level equal or above a Peak Voltage Level Detection Threshold, it immediately switches audio “on” in that direction for the Transmission Direction Hold Time. Audio from the other direction is muted and ignored during that time. Audio is not switched “off” until it is continuously below the Peak Voltage Level Detection Threshold for the Transmission Direction Hold Time. The DIP switch SW2 positions 5–7, located on the Main PCBA, selects Peak Voltage Level Detection Threshold and Transmission Direction Hold Time. Refer to Figure 6 for the location of switch SW2 on the Main PCBA and Table 1 and Table 2 below for setting options.

Table 1. Transmission Direction Hold Time Settings on Main PCBA

SW2-5

SW2-6

Transmission Direction Hold Time

 

 

 

 

 

 

Open*

Open *

1280 milliseconds

 

 

 

Closed

Open

640 milliseconds

 

 

 

Open

Closed

160 milliseconds

 

 

 

Closed

Closed

40 milliseconds

 

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

Table 2. Peak Voltage Level Detection Threshold on Main PCBA

SW2-7

Peak Voltage Level Detection Threshold

 

 

 

 

Open*

−12 dB relative to nominal

 

 

Closed

−24 dB relative to nominal

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Page Line Audio Monitoring Output

The Model LE200-RM provides a balanced 600-ohm audio output for monitoring audio on both the local and remote page lines. LE200-RM mixes the local and remote page line audio and routes it to the 600ohm audio output terminals. This audio can be sent to any external audio device (recorder, radio transmitter, amplifier, etc.) with an input impedance equal to or greater than 600 ohms. The audio output gain is adjustable using DIP switch SW3 positions 5–8 on the Main PCBA. Refer to Figure 6 for the location of switch SW3 on the Main PCBA and Table 3 below for setting options.

Table 3. Page Line Monitor Output Gain Setting on Main PCBA

 

 

 

 

Monitor Output

SW3-5

SW3-6

SW3-7

SW3-8

Gain

 

 

 

 

 

 

 

 

 

 

Open*

Open*

Open*

Open*

0 dB

 

 

 

 

 

Closed

Open

Open

Open

−30 dB

 

 

 

 

 

Open

Closed

Open

Open

−27 dB

 

 

 

 

 

Closed

Closed

Open

Open

−24 dB

 

 

 

 

 

Open

Open

Closed

Open

−21 dB

 

 

 

 

 

Closed

Open

Closed

Open

−18 dB

 

 

 

 

 

Open

Closed

Closed

Open

−15 dB

 

 

 

 

 

Closed

Closed

Closed

Open

−12 dB

 

 

 

 

 

Open

Open

Open

Closed

−9 dB

 

 

 

 

 

Closed

Open

Open

Closed

−6 dB

 

 

 

 

 

Open

Closed

Open

Closed

−3 dB

 

 

 

 

 

Closed

Closed

Open

Closed

0 dB

 

 

 

 

 

Open

Open

Closed

Closed

+3 dB

 

 

 

 

 

Closed

Open

Closed

Closed

+6 dB

 

 

 

 

 

Open

Closed

Closed

Closed

+9 dB

 

 

 

 

 

Closed

Closed

Closed

Closed

+12 dB

 

 

 

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Page Line Audio Detect Output Contact

The Model LE200-RM provides a contact closure output that activates whenever audio is detected on the page line. The contact can be set to close when audio is detected at the local page line, the remote page line, or both. Typically this contact is used in conjunction with the Page Line Audio Monitoring Output to provide a control contact to external devices or systems when page line audio is present. The contact remains active for 1 second after the audio is no longer detected. DIP switch SW5 positions 6 and 7 enables or disables the output contact. Refer to Figure 6 for the location of switch SW5 on the Main PCBA and Table 4 below for setting options.

Table 4. Page Line Audio Detect Contact Main PCBA

SW5-6

SW5-7

Audio Detect Contact Operation

 

 

 

 

 

 

Closed

Closed

Disabled

 

 

 

Open

Closed

Local page line audio activates the contact

 

 

 

Closed

Open

Remote page line audio activates the contact

 

 

 

Open*

Open*

Both local and remote page line audio activates the contact

 

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

Page Line FSK Data Transmission (SmartSeries Systems)

A pair of Model LE200-RM Line Extenders re-generates the FSK data transmission between two SmartSeries Page/Party® system cables. FSK data transmission occurs on the page line allowing SmartSeries Page/Party® stations to communicate with the system control cabinet. For proper operation, both Line Extenders must have this feature enabled by setting DIP switch SW5 position 1. Refer to Figure 6 for the location of switch SW5 on the Main PCBA and Table 5 below for setting options.

 

Table 5. Page Line FSK Transmission on Main PCBA

 

 

SW5-1

Page Line FSK Transmission

 

 

 

 

Open*

FSK data is disabled.

 

 

Closed

FSK data is enabled.

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

NOTE: FSK operation and VLC operation (described below) cannot be enabled at the same time. FSK operation is only used with SmartSeries systems.

VLC operation is only used within NON-SmartSeries systems. If both VLC and FSK are enabled at the same time, neither feature will function correctly.

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Page Line 50 kHz VLC Transmission

A pair of Model LE200-RM Line Extenders re-generates the 50 kHz VLC control signal between two Page/Party® system cables. 50 kHz VLC signaling occurs on the page line and is typically used to alter the speaker volume of Page/Party® stations equipped VLC receivers. VLC signals may also be used for other on/off control functions on some Page/Party® systems. For proper operation, both Line Extenders must have this feature enabled by setting DIP switch SW5 position 2. Refer to Refer to Figure 6 for the location of switch SW5 on the Main PCBA and Table 6 below for setting options.

Table 6. Page Line 50 kHz VLC Transmission Setting on Main PCBA

SW5-2 Page Line 50 kHz VLC Transmission

Open*

50 kHz VLC is disabled.

 

 

Closed

50 kHz VLC is enabled.

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

NOTE: FSK operation and VLC operation (described above) cannot be enabled at the same time. FSK operation is only used with SmartSeries systems.

VLC operation is only used within NON-SmartSeries systems. If both VLC and FSK are enabled at the same time, neither feature will function correctly.

Page Line Ground Fault Detection

The Model LE200-RM Line Extenders provide page line ground fault detection on the local Page/Party® system cable. If multiple LE200-RMs are connected to the same Page/Party® system cable segment, only one page line ground fault detector may be enabled. A shorting clip setting at header P5 on the Main PCBA enables the page line ground fault detection. Refer to Figure 6 for the location of header P5 on the Main PCBA and Table 7 below for setting options:

Table 7. Page Line Ground Fault Detection Setting on Main PCBA

P5 Shorting Clip

Page Line Ground Fault Detection

 

 

 

 

Pins 1–2*

Page line ground fault detection is disabled.

 

 

Pins 2–3

Page line ground fault detection is enabled.

 

 

Removed

Page line ground fault detection is disabled.

 

 

NOTES:

1.If connecting an LE200-RM to the same system cable segment as an ADVANCE Page/Party® Interface (PPI) card, disable the LE200-RM page line ground fault detector. The PPI card contains the ground fault detector. If both ground fault circuits are enabled simultaneously, intermittent SmartSeries FSK data errors will occur between the PPI card and SmartSeries stations.

2.Changes to this parameter take effect without cycling power.

3.*Indicates default position.

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Page Line Ground Fault Re-generation

When a ground fault is detected at a remote LE200-RM Line Extender, the ground fault can be duplicated on the local Page/Party® system cable. DIP switch SW5 position 3 enables regeneration of the ground fault. Refer to Figure 6 for the location of switch SW5 on the Main PCBA and Table 8 below for setting options.

 

Table 8. Page Line Ground Fault Regeneration Setting on Main PCBA

 

 

SW5-3

Page Line Ground Fault Regeneration

 

 

 

 

Open*

Disabled - Page line ground faults detected on the remote system cable are NOT

 

regenerated on the local system cable.

 

 

Closed

Enabled - Page line ground faults detected on the remote system cable are regenerated on

 

the local system cable.

 

 

NOTES:

1.The ground fault regeneration feature is used in SmartSeries systems to allow a ground fault on the remote cable segment to be detected by the system control cabinet. Disable this feature if the Line Extender is not installed in this type system.

2.Changes to this parameter take effect without cycling power.

3.*Indicates default position.

Page Line Ground Fault Output Contact

The Model LE200-RM provides a relay contact that activates whenever a ground fault is detected on the local page line, remote page line or both the page lines. The ground fault detection feature (described above) must be enabled. The contact output can be used to activate an external device or system which annunciates the fault condition. The DIP switch SW5 positions 4 and 5 configure which page line ground faults activate this contact. Refer to Figure 6 for the location of switch SW5 on the Main PCBA and Table 9 below for setting options.

Table 9. Page Line Ground Fault Contact Setting on Main PCBA

SW5-4

SW5-5

Page Line Ground Fault Contact

 

 

 

 

 

 

Closed

Closed

Disabled

 

 

 

Closed

Open

Remote page line ground fault activates the contact.

 

 

 

Open

Closed

Local page line ground fault activates the contact.

 

 

 

Open*

Open*

Both Local and Remote page line ground faults activate the contact.

 

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Party Line Audio Transmission

A pair of Model LE200-RM Line Extenders provides full duplex party line audio between two Page/Party® system cables, for party lines 1–5. During on-hook conditions of the party lines (meaning no handset stations are in use), the LE200-RM will mute the local party line analog circuits. If it is necessary to have party line audio enabled even when no stations are off-hook, DIP switch SW6-3 may be closed to disable this muting feature. This switch affects the on-hook muting function of all five party lines simultaneously. Refer to Figure 6 for the location of switch SW6 on the Main PCBA and Table 10 below for setting options.

 

Table 10. Party Line On-Hook Muting Setting on Main PCBA

 

 

SW6-3

Party Line On-Hook Muting

 

 

 

 

Open*

Enabled – local party lines are muted when no handset stations are in-use.

 

 

Closed

Disabled – party line audio is never muted.

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

Party Line Off-Hook Regeneration

When an off-hook handset station is detected, the LE200-RM can transmit the off-hook condition to remote Line Extenders so that it is duplicated on the remote Page/Party® system cable. Typically this feature is used in systems that contain a telephone interface device so that the caller is transferred to the party line when a handset station answers the call. DIP switch SW6 position 2 is used to enable this feature. This switch affects the off-hook regeneration function of all five party lines. Refer to Figure 6 for the location SW6 on the Main PCBA and the Table 11 below for setting options.

 

Table 11. Off-Hook Regeneration on Main PCBA

 

 

SW6-2

Off-Hook Regeneration Setting

 

 

 

 

Open*

Enabled – an off hook condition on the local party line is regenerated at the

 

remote Line Extender.

 

 

Closed

Disabled

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Party Line Off-Hook Detection

The Model LE200-RM Line Extenders provide off-hook detection on the local Page/Party® system cable for party lines 1 through 5. An off-hook condition means a handset station is in use. If multiple Line Extenders are connected to the same Page/Party® system cable segment, only one off-hook detector can be enabled. If connecting an LE200-RM to the same system cable segment as an ADVANCE Page/Party Interface (PPI) card, disable the LE200-RM off-hook detection for party lines 1 and 2. The PPI card contains off-hook detection for party lines 1 and 2.

Several shorting clips (P6–P15) are used to enable the off-hook detection feature on party line 1 through 5. Two shorting clips are associated with each party line and must be set to the same position for proper operation. The party lines 1–5 are configured independently. Refer to Figure 6 for the location of P6–P15 on the Main PCBA and Table 12 below for setting options.

Table 12. Party Line Off-Hook Detection Setting on Main PCBA

Party Line

Headers

Shorting Clip

Off-Hook Detection

 

 

 

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

Party Line 1

P15,

P14

Pins 2–3

Enabled

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

Party Line 2

P13,

P12

Pins 2–3

Enabled

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

Party Line 3

P11,

P10

Pins 2–3

Enabled

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

Party Line 4

P9,

P8

Pins 2–3

Enabled

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

Party Line 5

P7,

P6

Pins 2–3

Enabled

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

NOTES:

1.Changes to this parameter take effect without cycling power.

2.*Indicates default position.

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Audio Line Connection Relays

The Model LE200-RM has relays that disconnect the page, party lines 1–5 and the page monitoring output connections from the Main PCBA. The disconnect feature is used for special applications such as connection of a single party line system or other scenarios in which a particular audio line is not physically connected to the Line Extender. DIP switch SW4 is used to control the audio line disconnect feature. Refer to Figure 6 for the location of SW4 on the Main PCBA and Table 13 below for setting options.

Table 13. Audio Line Connection Relay Settings on Main PCBA

Audio Line

Switch SW4

Setting

Field Wiring

 

 

 

 

 

 

 

 

Party line 5

SW4-1

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Party line 4

SW4-2

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Party line 3

SW4-3

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Party line 2

SW4-4

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Party line 1

SW4-5

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Page line

SW4-6

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

Page monitor

SW4-7

Open

Disconnected

 

 

Closed*

Connected

 

 

 

 

 

 

N/A

SW4-8

Open

Not used

 

Closed*

 

 

 

 

 

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Audio Line Muting

In some system configurations, the Page/Party® system cable is not connected to the Line Extender. In this case, all audio lines (page and party lines 1–5) should be muted since they are not physically connected. DIP switch SW6 position 4 on the Main PCBA enables this feature. If this feature is enabled, it is unnecessary to disconnect the audio lines using the audio line relays (mentioned above). Refer to Figure 6 for the location of SW6 on the Main PCBA and Table 14 below for setting options.

 

Table 14. Audio Line Mute Setting on Main PCBA

 

 

SW6-4

Mute Analog Lines Setting

 

 

 

 

Open*

Disabled - Party lines 1–5 and page line are operational.

 

 

Closed

Enabled - Party lines 1–5 and page line are muted.

 

 

NOTES: 1. Changes to this parameter take effect without cycling power. 2. *Indicates default position.

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Page/Party®Line Balance

For proper system operation, the page line and party lines 1–5 must be terminated with a resistance of approximately 33 ohms. The Model LE200-RM provides potentiometers to set the line balance resistance on the page line and five party lines. The line balance resistors are located on the Audio Termination Connection Module (part of Model 12118-011 Kit) next to the page and party line terminal blocks. The line balance resistors are adjustable or can be disabled using shorting clips P1–P7.

If connecting an LE200-RM to the same system cable segment as an ADVANCE Page/Party Interface (PPI) card, disable the line balance for party lines 1, 2 and the page line. The PPI card provides the line balance resistors for these audio lines. Refer to Figure 4 for the location of the jumpers and potentiometers on the Audio Termination Connection Module and the Table 15 for setting details.

Table 15. Page/Party® Line Balance Settings on Audio Termination Connection Module

 

 

 

 

 

Adjustment

Audio Line

Header

Shorting Clip

Line Balance

 

Potentiometer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Party line 5

P6

Pins 2–3

Enabled

 

R23

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Party line 4

P3

Pins 2–3

Enabled

 

R19

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Party line 3

P1

Pins 2–3

Enabled

 

R3

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Party line 2

P2

Pins 2–3

Enabled

 

R4

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Party line 1

P4

Pins 2–3

Enabled

 

R20

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

 

 

Pins 1–2*

Disabled

 

 

 

 

 

 

 

 

Page line

P7

Pins 2–3

Enabled

 

R24

 

 

 

 

 

 

 

 

Removed

Disabled

 

 

 

 

 

 

 

 

NOTES: *Indicates default position.

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