Hubbell GAI-TRONICS SP2 User manual

Pub. 42004-780E
G A I - T R O N I C S ®
A H U B B E L L C O M P A N Y
SP2 Class I Div. 2
Handset/Speaker Amplifier Station
TA B L E O F CO N T E N T S
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice.....................................................................................................................1
General Information.......................................................................................................................1
Product Overview ...................................................................................................................................1
Features....................................................................................................................................................2
Options.....................................................................................................................................................2
Installation ......................................................................................................................................3
Important Safety Instructions................................................................................................................3
Enclosure Mounting and Cable Entries................................................................................................4
Open the Station......................................................................................................................................5
Field Wiring and Configuration............................................................................................................5
Station Ground......................................................................................................................................5
Termination PCBA ...............................................................................................................................6
Main PCBA.........................................................................................................................................11
Settings and Adjustments..............................................................................................................13
Open the Station....................................................................................................................................13
Main PCBA Configuration ..................................................................................................................13
Write Protect (EEPROM) Jumper....................................................................................................... 13
WDOG Enable (Watchdog) Jumper ................................................................................................... 13
Boot Enable Jumper............................................................................................................................13
Reset Switch........................................................................................................................................14
Speaker and 600-ohm Audio Output Volume..................................................................................... 14
Receiver Volume ................................................................................................................................15
Group and Station Number Selector Switches....................................................................................15
Main PCBA Indicators.........................................................................................................................15
Power LED..........................................................................................................................................15
Heartbeat LED....................................................................................................................................15
Ethernet Connection LEDs .................................................................................................................15
Five Configurable LEDs.....................................................................................................................15
Front Cover Installation.......................................................................................................................16
Programming ................................................................................................................................16
Operation.......................................................................................................................................16
Standard Handset Paging.....................................................................................................................16
Party Line Communication..................................................................................................................17

Table of Contents Pub. 42004-780E
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374 ◼800-492-1212 ◼Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
All-Call Button Use...............................................................................................................................17
Alternate-Page Destination Switch Use...............................................................................................18
Headset Use............................................................................................................................................18
Maintenance..................................................................................................................................19
Troubleshooting....................................................................................................................................19
Service and Spare Parts........................................................................................................................20
Reference Documentation ............................................................................................................20
Specifications ................................................................................................................................20
Power......................................................................................................................................................20
Ethernet .................................................................................................................................................21
RTU........................................................................................................................................................21
Audio......................................................................................................................................................21
Mechanical.............................................................................................................................................22
Environmental.......................................................................................................................................22
Approvals.......................................................................................................................................22

Pub. 42004-780E
GAI-TRONICS®
A HUBBELL COMPANY
SP2 Class I Div. 2
Handset/Speaker Amplifier Station
GAI-TRONICS 3030 KUTZTOWN RD. READING, PA 19605 USA
610-777-1374  800-492-1212  Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Confidentiality Notice
This manual is provided solely as an installation, operation, and maintenance guide and contains sensitive
business and technical information that is confidential and proprietary to GAI-Tronics. GAI-Tronics
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.
This product contains copyrighted computer programs stored in semiconductor memory. These programs
are copyrighted by GAI-Tronics Corporation and may not be reproduced in any form without express
written permission from GAI-Tronics.
General Information
Product Overview
The GAI-Tronics SP2 station is a modular industrial
multicast VoIP (Voice over Internet Protocol)
communication system. The standard Class I Div. 2
SP2 station configuration is an indoor, multi-party,
handset/speaker amplifier station using ac power with
RTU control. They are constructed of cold rolled steel
with a gray or safety orange powder-coat finish.
Multiple options are available to add to or modify
station capabilities (see the Features and Options
sections below).
SP2 stations connect to an Ethernet network so the loss
of a single station will not adversely affect the entire
system. Each station requires a 100 Mbps link to a
switch or router using category 5e or better Ethernet
cable. Isolate SP2 network traffic from other network
devices to ensure the quality of SP2 audio. Properly
configure network switches and routers for IGMP
(Internet Group Management Protocol) snooping and
multicast filtering. Maximum cable runs between SP2
stations and network switches are limited to 100 meters
to comply with Ethernet standards.
Figure 1. SP2 Station Front Panel

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Features
•flexible and highly configurable SMART technology featuring ALS (Ambient Level Sensing), real
time self-diagnostics, and available remote monitoring
•real-time operation providing instantaneous page and party line communication
•no SIP server or conference bridge requirement
•one-way live paging and alarm annunciation over system speakers
•distributed amplifier topology—loss of an individual amplifier will not adversely affect the remaining
system
•mutual provisioning mode allows easy system deployment
•high efficiency (>80%) Class D paging amplifier provides up to 30 watts of speaker output at 8 ohms
•five configurable multicast channels for full-duplex conference communication with party line
selector switch
•eight configurable multicast channels for receiving page announcements
•one isolated output for beacon activation
•two isolated inputs (one isolated input with optional 70V/100V termination PCBA)
•600-ohm audio I/O with control
•configurable priority scheme allows urgent/emergency pages to override less important pages
•configuration stored in non-volatile memory
•field adjustable volume control for handset earpiece, headset earpiece, and speaker amplifier
•configurable local and nearby speaker mutual muting to prevent acoustic feedback of live pages
•configurable preannouncement tone
•off-hook and page switch timeout functionality
•configurable virtual zoning ability
•USB interface for field or bench configuration
•universal ac power supply
•durable, high-visibility safety orange powder coat finish
Options SP2 station options are factory installed.
•70-volt/100-volt constant voltage speaker termination board with 24-watt monitored output
•24 V dc power supply
•speaker amplifier only (no handset)
•headset with page pressbar for loud environments
•five configurable multicast channels for alternate page destinations with page line selector
•All-Call push button for secondary page destination.
•PVC or Hytrel®handset cords in 6-, 15-, or 25-foot lengths
•conformal coating for PCBA
•gray powder-coat finish

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Installation
Important Safety Instructions
•Read, follow, and retain instructions—Read and follow all safety and operating instructions before
operating the unit. Retain instructions for future reference.
•Heed warnings—Adhere to all warnings on the unit and in the operating instructions.
•Attachments—Do not use attachments not recommended by the product manufacturer, as they may
cause hazards.
•Servicing—Do not attempt to service this unit. Opening or removing covers may expose dangerous
voltage or other hazards. Refer all servicing to qualified service personnel.
ATTENTION
—Install equipment without modification and according to all applicable local,
national, and international electrical codes. North America—Consult the
National Electrical Code (NFPA 70), Canadian Standards Association (CSA
22.1), and local codes for specific requirements regarding your installation.
Install Class 2 circuit wiring in accordance with the NEC.
This equipment is suitable for use in Class I Division 2 Groups A, B, C, and D, Class II Division 2
Groups F and G, Class III, OR non-hazardous locations only. Combinations of equipment in each system
are subject to investigation by the local authority at the time of installation.
WARNING
—EXPLOSION HAZARD—Do not disconnect equipment before removing
power and verifying the area is non-hazardous. Averttissement—Risque
d’explosion—avant de déconnector l’equipment, couper le courant ou s’assurer
que l’emplacement est désigné non dangereux.
WARNING
—Do NOT install this equipment in hazardous areas other than those indicated in
the Approvals section of this manual. Such installation may cause a safety
hazard and consequent injury or property damage.
WARNING
—In 24 V dc systems: Do NOT operate this equipment from a battery charger
with the batteries disconnected. Most 24 V dc battery chargers have an
unloaded output of 35 to 45 volts that can quickly damage equipment designed
for 24 volts nominal. Do not allow the maximum battery voltage to exceed the
maximum specified input voltage.
WARNING
—Do not disconnect equipment while energized.
Ensure proper grounding to protective earthing
Only trained, qualified, and competent personnel must install these enclosures. Installation must comply
with state and national regulations, as well as safety practices for this type of equipment.

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Enclosure Mounting and Cable Entries
The mounting location must be flat and
provide proper clearance, rigidity, and
strength to support the enclosure and all
contained devices.
1. Mount the enclosure using the four
0.312-inch (8 mm) diameter holes
located on the mounting flanges with
¼-inch (M6) hardware (see Figure
2).
• The suggested mounting height
for all station enclosures is 48
inches (1219 mm) to the center
of the bottom mounting holes of
the enclosure.
• SP2 stations are not supplied
with conduit or cable openings.
2. Remove the front panel (see the
Open the Station section).
3. Drill or punch entry openings in the
rear section of the enclosure (see
Figure 2).
• The station is suitable for bottom
and/or top entry.
• using 70-volt/100-volt line audio
requires bottom entry.
• Recommended: Bottom entry
prevents condensation that may
form in the conduit from
dripping onto the termination
PCBA.
• The minimum material (spacing)
between entry holes is ½ inch (13
mm).
NOTE: Do not use top entry with the
70V/100V termination PCBA.
Figure 2. Suggested Wire Entry Locations

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Open the Station
Complete the following steps to open the station:
1. Remove the four screws from the front panel and turn it to the left to expose the interior surfaces.
2. Keep the wiring and ribbon cables connected.
3. Mount the front panel to the holes on the left side of the rear enclosure using two of the screws just
removed.
Figure 3. Class I Div. 2 SP2 Station—Interior View
Field Wiring and Configuration
The Class I Div. 2 SP2 station provides terminal blocks on the termination PCBA, located in the rear of
the enclosure, for field wiring the power, speaker, and RTU connections. The main PCBA, mounted to
the back of the front panel, provides pluggable terminal blocks for the Ethernet and 600-ohm audio
connections.
NOTE: Consult the National Electrical Code (NFPA 70), Canadian Standards Association (CSA 22.1),
and local codes for the specific requirements regarding your installation. Install all equipment
without modification and according to the local and national codes. Install Class 2 circuit wiring
in accordance with the NEC.
Station Ground
Connect the station enclosure to earth ground:
1. Install a #6 ring lug on the ground conductor.
2. Secure it to the ground terminal, located in the lower left corner, at the back of the rear enclosure (see
Figure 3).

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Termination PCBA
Install all connections as indicated in the following sections:
Figure 4. SP2 Standard Termination PCBA
(Optional 70V/100V Termination PCBA Similar)
Direct Speaker Connection and Jumper Settings
Terminate the station’s 8 or 16-ohm remote speaker(s) to terminal block TB1.
1. Pull the speaker cable(s) into the enclosure.
2. Install spade lugs on the wires.
3. Connect the speaker wires to terminal block TB1 (see Table 1)
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
5. Configure the speaker jumpers, P2 and P3, for the appropriate impedance for use with 8-ohm or 16-
ohm speakers (see Figure 4 and Figure 5).
A redundant set of terminals enables connection of a second speaker branch connected in series or parallel
with the primary speaker.

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Table 1. Direct Speaker Connections—TB1
Pin Label Description
TB1-1 + Parallel/SPEAKER A Series—Output
TB1-2 ⏚ Earth Reference
TB1-3 − Parallel/SPEAKER A Series—Output
TB1-4 + Parallel/SPEAKER B Series—Output
TB1-5 ⏚ Earth Reference
TB1-6 − Parallel/SPEAKER B Series—Output
Figure 5. 8/16-ohhm Speaker Impedance Configuration
and AC/DC Termination at TB3

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70-V/100-V Termination Board Option—Speaker Connections with Monitoring
The optional 70-volt/100-volt speaker line-
monitoring PCBA replaces the standard
termination board and enables connection of
70-volt and/or 100-volt speakers to the
SP2station. Terminate the station’s speaker
loop(s) to terminal block TB1. Wire all
speakers in parallel. One speaker loop can be
monitored by terminating the return cable to the
LINE SPRVN terminals at terminal block TB2
(see Figure 6 and Table 2).
1. Pull the 70-volt and/or 100-volt speaker
cable(s) into the enclosure.
2. Install spade lugs on the wires.
3. Connect 100-volt speakers between the
100V and COM terminals on TB1.
Connect 70-volt speakers between the 70V
and COM terminals onTB1.
Two sets of terminals exist for the 70-volt
and 100-volt speaker loops, providing
termination for additional speaker loops.
NOTE: The station can monitor only one
speaker loop
4. For speaker line supervision, connect the
speaker return wires to the LINE SPRVN +
and − terminals at TB2 (see Table 4).
5. Move jumper P2 to pins 2–3 to enable
ground fault monitoring
6. Torque the terminal block screws to 8–10
in·lb (0.90–1.13 N·m).
NOTE: The combined wattage (tap settings)
for all speakers must never exceed the
amplifier power rating (24 W).
Table 2. 70 V/100 V Speaker Connections—TB1
Pin Label Description
TB1-1 100V 100 V Parallel Speakers—Output
TB1-2 COM Common
TB1-3 70V 70 V Parallel Speakers—Output
TB1-4 100V 100 V Parallel Speakers—Output
TB1-5 COM Common
TB1-6 70V 70 V Parallel Speakers—Output
Figure 6. 70-V/100-V Termination PCB
A

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RTU Inputs
The standard termination PCBA contains two auxiliary RTU inputs. The optional 70V/100V termination
board provides speaker line monitoring and has just one auxiliary RTU input. Terminate the inputs at
terminal block TB2 (see Figure 4).
1. Pull the RTU input cable(s) into the enclosure.
2. Install spade lugs on the wires.
3. Connect the RTU input wires to terminal block TB2 (see Table 3 or Table 4).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
5. Install end-of-line resistors (see Figure 7) to enable RTU input-cable monitoring.
Table 3. Standard Termination Board
RTU Input Termination—TB2
Table 4. 70V/100V Termination Board
Speaker Line Monitoring and RTU Input
Termination—TB2
Pin Label Function Pin Label Function
TB2-1
+
RTU 1
INPUT
RTU Input 1 + TB2-1
+
LINE
SPRVN
70 V/100 V
Supervision +
TB2-2 − RTU Input 1 − TB2-2 − 70 V/100 V
Supervision −
TB2-3
+
RTU 2
INPUT
RTU Input 2 + TB2-3
+
RTU
INPUT
RTU Input +
TB2-4 − RTU Input 2 − TB2-4 − RTU Input −
Figure 7. RTU Input Wiring Configurations for Cable Monitoring

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RTU Output
Two form C contacts are provided to power a beacon (see Figure 8). Terminate the output at terminal
block TB2 (see Figure 4). Configure the output for dry contact use by removing jumpers JU1 and JU2.
WARNING —Line voltage is present at the NO contact until JU1 and JU2 are removed.
1. Pull the RTU output cable into the enclosure.
2. Install spade lugs on the wires.
3. Connect the RTU output wires to terminal block TB2 (see Table 5).
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
For beacon cable monitoring:
5. Install a 20-kilohm 10-watt resistor across the terminals of the beacon cable (see Figure 8).
6. Install jumpers at terminal block TB2 to enable cable monitoring (see Figure 8).
NOTE: Using an RTU input to monitor the beacon wiring makes it unavailable for other functions.
Table 5. RTU Output Contacts—TB2
Pin Label Description
TB2-5 NC A Normally Closed Output A
TB2-6 NC B Normally Closed Output B
TB2-7 COM A Common Output A
TB2-8 COM B Common Output B
TB2-9 NO A Normally Open Output A
TB2-10 NO B Normally Open Output B
Figure 8. Supervised Output Wiring—TB2

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Power
The ac or optional dc power supply is on the termination PCBA. Connect the local ac or dc power source
to terminal block TB3 (see Figure 4, Figure 5, and Figure 6):
1. Pull the cable from the power source into the enclosure.
2. Install spade lugs on the wires.
3. Connect the ac (see Table 6) or dc (see Table 7) power source conductors to terminal block TB3.
4. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
Table 6. AC Power—TB3 Table 7. DC Power—TB3
Pin Label Description Pin Label Description
TB3-1 LINE Positive TB3-1 + Positive
TB3-2 NEUTRAL Negative TB3-2 − Negative
TB3-3 ⏚ Earth ground TB3-3 No Connection
Main PCBA
600-Ohm Audio I/O with Control
SP2 stations have a 600-ohm audio input to broadcast line level audio over the page line. The station
broadcasts the 600-ohm input audio stream upon closure of a normally open dry contact input control.
SP2 stations also provide a 600-ohm audio output for sending page line audio to a remote audio amplifier.
A solid-state dry contact relay controls when the remote amplifier plays the audio.
1. Pull the cable for the 600-ohm audio I/O into the enclosure.
2. Install ferrules onto the wire ends.
3. Connect the 600-ohm audio wires to the pluggable terminal block for the 600-ohm audio I/O
connection (see Table 8 and Figure 9).
4. Connect the pluggable terminal block to terminal block receptacle TB1.
Table 8. 600-Ohm Audio I/O Interface Connections—TB1
Pin Label Description
TB1-1 IN CT1+ Input Control Positive
TB1-2 IN CT1− Input Control Negative
TB1-3 IN AUD+ Input Audio Positive
TB1-4 IN AUD− Input Audio Negative
TB1-5 OUT AUD+ Output Audio Positive
TB1-6 OUT AUD− Output Audio Negative
TB1-7 OUT CT1+ Output Control Positive
TB1-8 OUT CT1− Output Control Negative

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Figure 9. SP2 Main PCBA (Ethernet)
Ethernet Termination
1. Pull a dedicated category 5e or better Ethernet cable into the rear enclosure.
Maximum Ethernet cable length is 100 m.
2. Install ferrules onto the wire ends.
3. Connect the Ethernet cable to the 8-position pluggable terminal block (see Figure 9).
4. Connect the pluggable terminal block to terminal block TB2 (see Figure 9).
NOTE: SP2 stations require shielded Ethernet cable or metallic conduit.
Table 9. Ethernet Connection—TB2
Pin Label Description
TB2-1 Unused
TB2-2 Unused
TB2-3 RX− Data Receive −
TB2-4 Unused
TB2-5 Unused
TB2-6 RX+ Data Receive +
TB2-7 TX− Data Transmit −
TB2-8 TX+ Data Transmit +

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Settings and Adjustments
Open the Station
Complete the following steps to open the station:
1. Remove the four screws from the front panel and turn it to the left to expose the interior surfaces.
2. Keep the wiring and ribbon cables connected.
3. Mount the front panel to the rear enclosure using two of the screws just removed (see Figure 10).
Figure 10. Class I Div. 2 SP2 Station—Interior View
Main PCBA Configuration
Refer to Figure 11 for switch, jumper, and LED locations on the main PCBA.
Write Protect (EEPROM) Jumper
NOTE: Do not adjust this jumper in the field.
WDOG Enable (Watchdog) Jumper
Watchdog jumper, P11, enables a watchdog feature for software purposes. Do not adjust this jumper in
the field. The default setting is shorted.
Boot Enable Jumper
Jumper P8—BOOT, is for development purposes only. Do not adjust this jumper in the field. The default
setting is open.

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Reset Switch
Reset switch, S1 reboots the station to its initial state. All configuration settings remain programmed.
Figure 11. Main PCBA (Front and Rear Views)
Speaker and 600-ohm Audio Output Volume
The speaker volume potentiometer, R36, adjusts the signal level to the speaker from the page line. When
600-ohm audio is also connected, R36 adjusts the volume for both. Use the CLI (Command Line
Interface) to configure the output level when using 600-ohm audio without external speakers. The default
setting is 4 watts from an 8-ohm speaker and 2 watts from a 16-ohm speaker.
WARNING —Maximum output power may exceed rated speaker wattage resulting in speaker
damage.
To adjust the speaker or speaker and 600-ohm output volume:
1. Turn the speaker volume potentiometer, R36, fully counterclockwise.
The speaker emits an audible test-tone.
2. Slowly turn R36 clockwise to obtain the desired output volume.
The test-tone ceases three seconds after making no adjustments.
This setting can also be configured via USB or Ethernet connection using the CLI.
NOTE: Configuring this setting with the SP2 Console in a mutually provisioned system overrides this
setting on the station. See the SP2 Configuration Guide, Pub. 42004-784 (see the Reference
Documentation section).

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Receiver Volume
Use the receiver volume potentiometer, R37, to adjust the handset volume:
1. Remove the handset from the cradle.
2. Turn the receiver volume potentiometer, R37, fully counterclockwise.
The receiver emits an audible test-tone.
3. Slowly turn R37clockwise to obtain the desired output volume.
The test-tone ceases three seconds after making no adjustments.
This setting can also be configured via USB or Ethernet connection using the CLI.
NOTE: Configuring this setting with the SP2 Console in a mutually provisioned system overrides this
setting on the station. See the SP2 Configuration Guide, Pub. 42004-784 (see the Reference
Documentation section).
Group and Station Number Selector Switches
One group-number and two station-number hex-selector switches configure SP2 stations for mutual
provisioning (see Figure 11). Each hex switch has a small arrow that indicates the current setting.
1. Adjust the position of the group-number selector switch to the desired group [0–F].
2. Adjust the two station-number switches to assign the station number [00–FF].
NOTE:Do NOT assign the same group/station number to more than one station.
Configure at least one SP2 station as a master station to utilize mutual provisioning in an SP2 system.
Assign addresses [0.01], [0.02], or [0.03] to the master stations using the selector switches. Master
station(s) store the configuration for all SP2 stations on the network. Each SP2 station retrieves the
mutual provisioning configuration from the master station as it powers up. See Pub. 42004-784, SP2
Configuration Guide, for detailed information on configuring SP2 stations and SP2 system mutual
provisioning (see the Reference Documentation section).
Main PCBA Indicators
Power LED
The POWER LED illuminates when power is applied to the station, indicating the main board power
supply is operational (see Figure 11).
Heartbeat LED
The HEARTBEAT LED flashes when network communication is established, indicating the microprocessor
is operational (see Figure 11).
Ethernet Connection LEDs
Three Ethernet connection LEDs are located on the main PCBA; link (LNK), link speed (SPD), and
activity (ACT). The LNK LED is blue, the SPD LED is green, and the ACT LED is yellow. The LNK and
SPD LEDs indicate an active 100 Mbps Ethernet link when off. The activity LED, ACT, blinks yellow to
indicate Ethernet data activity (see Figure 11).
Five Configurable LEDs
Configure the five LEDs (see Figure 11) through firmware. Information for configuring these LED
indicators is in the SP2 Configuration Guide, Pub. 42004-784 (see the Reference Documentation section).

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Front Cover Installation
After all adjustments are complete:
1. Place the front cover onto the rear enclosure.
Do not to pinch any cables.
2. Secure the front cover using the four screws and washers provided.
3. Torque the screws to 50 in·lb (5.65 Nm).
Programming
SP2 stations are factory configured to provide basic page/party functions upon power-up. Configure
stations for custom operation and/or larger system designs using the CLI or SP2 Console application.
Refer to Publication 42004-784, SP2 Configuration Guide (see the Reference Documentation section).
Operation
Standard Handset Paging
Complete the following steps to make a page announcement from an SP2 handset station:
1. Lift the handset from the cradle.
2. If requesting conversation: rotate the party-line selector switch to select an unoccupied party line.
3. Press and hold the handset pressbar (not necessary when using the optional ALL-CALL button).
4. After hearing the short preannouncement tone (if configured), speak directly into the microphone to
broadcast the page/announcement.
NOTE:SP2 stations incorporate a noise-canceling microphone to reduce transmitted ambient noise.
This requires the user to place the microphone as close as possible to their mouth.
5. If requesting conversation:
1. Designate the party line selected in Step 2.
2. Release the handset pressbar.
3. Wait for the designated individual(s) to respond.
Full-duplex communication takes place on the party line without broadcasting over the system’s
speakers.
6. Replace the handset in the cradle.

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Party Line Communication
To respond to a page:
1. Turn the party-line selector switch on any SP2 station in the system to the requested party line.
2. Pick up the station handset.
Full-duplex communication takes place on the party line without broadcasting over the system’s
speakers.
NOTE: SP2 stations incorporate a noise-canceling microphone to reduce transmitted ambient noise.
This requires the user to place the microphone as close as possible to their mouth.
3. Return the handset to the cradle following the party line conversation.
The system speakers do not broadcast party line conversations. Other individuals can join the
conversation at any time by picking up a handset and rotating the party-line selector switch to the party
line in use.
All-Call Button Use
Use the ALL-CALL button to page an alternate
destination that is programmed for the station
(see Figure 12). The ALL-CALL option must be
software configured for the SP2 station. To
initiate a page using the ALL-CALL feature:
1. Lift the handset from the cradle.
2. If requesting conversation: rotate the party-
line selector switch to an unoccupied party
line.
3. Press and hold the ALL-CALL button.
The ALL-CALL button eliminates the need to
press the handset or headset (if equipped)
pressbar.
4. After hearing the short preannouncement
tone (if configured), speak directly into the
microphone to broadcast the
page/announcement.
NOTE: SP2 stations incorporate a noise-
canceling microphone to reduce
transmitted ambient noise. This
requires the user to place the
microphone as close as possible to
their mouth.
5. Release the ALL-CALL button and wait for a
response on the party line (if requested).
6. Return the handset to the cradle when
finished.
Figure 12. All-Call Button Locatio
n

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Alternate-Page Destination Switch Use
Use the ALT-PAGE selector switch to page one of
five alternate destinations programed for the
station (see Figure 13). Alternate page
destinations must be software configured for SP2
stations. To initiate a page using the ALT-PAGE
selector switch:
1. Lift the handset from the cradle.
2. If requesting conversation: rotate the party-
line selector switch to an unoccupied party
line.
3. Select the desired page destination using the
ALT-PAGE selector switch.
4. Press and hold the handset pressbar.
5. After hearing the short preannouncement
tone (if configured), speak directly into the
microphone to broadcast the
page/announcement.
NOTE: SP2 stations incorporate a noise-
canceling microphone to reduce
transmitted ambient noise. This
requires the user to place the
microphone as close as possible to
their mouth.
6. Release the handset pressbar.
7. Return the handset to the cradle or wait for a
response on the party line (if requested).
Headset Use
Initiate a call with the optional headset feature as follows:
1. Attach the headset assembly to the auxiliary jack on the station (see Figure 12 or Figure 13).
2. If requesting conversation: rotate the party-line selector switch (if equipped) to an unoccupied party
line.
3. Rotate the ALT-PAGE selector switch (if available) or press the ALL-CALL button (if available) to
select an alternate destination for the page/announcement.
4. Press and hold the headset pressbar (not necessary when using the optional ALL-CALL button).
5. After hearing the short preannouncement tone (if configured), speak directly into the microphone to
broadcast the page/announcement.
6. Release the headset pressbar.
7. Wait for a response on the party line (if requested).
NOTE: For stations with an auxiliary jack, the Model 10401-201 Headset and Model 10416-103
Extension Cord allow the user to be hands-free and mobile while maintaining communication.
Connecting the headset disables the handset microphone.
Figure 13. Alternate-Page Switch Locatio
n