GAI-Tronics SP2 User manual

Pub. 42004-787L2A
GAI-TRONICS®CORPORATION
A H U B B E L L C O M P A N Y
SP2 Zone 2/22 Weatherproof
Handset/Speaker Amplifier Station
TA B L E O F CO N T E N T S
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 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
Mounting the Enclosure.........................................................................................................................4
Cable Entries...........................................................................................................................................4
Opening the Station ................................................................................................................................5
Field Wiring and Configuration............................................................................................................5
Station Ground......................................................................................................................................5
Termination PCBA Connections ..........................................................................................................6
Main PCBA.........................................................................................................................................11
Settings and Adjustments..............................................................................................................13
Opening the Station ..............................................................................................................................13
Main PCBA Configuration ..................................................................................................................13
Write Protect (EEPROM) Jumper.......................................................................................................13
WDOG Enable (Watchdog) Jumper ...................................................................................................13
Boot Enable Jumper............................................................................................................................13
Reset Switch........................................................................................................................................13
Speaker and 600-ohm Audio Output Volume.....................................................................................14
Receiver Volume ................................................................................................................................14
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
Attaching the Front Cover...................................................................................................................15
Programming ................................................................................................................................15
Operation.......................................................................................................................................16
Standard Handset Paging.....................................................................................................................16

Table of Contents Pub. 42004-787L2A
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: [phone]
VISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Party Line Communication..................................................................................................................16
Headset Use............................................................................................................................................16
All-Call Button Use...............................................................................................................................17
Alternate-Page Destination Switch Use...............................................................................................17
Maintenance..................................................................................................................................18
Troubleshooting....................................................................................................................................18
Service and Spare Parts........................................................................................................................19
Specifications ................................................................................................................................19
Power......................................................................................................................................................19
Ethernet .................................................................................................................................................19
RTU........................................................................................................................................................19
Audio......................................................................................................................................................20
Mechanical.............................................................................................................................................21
Environmental.......................................................................................................................................21
Approvals.......................................................................................................................................21
Reference Material........................................................................................................................21

Pub. 42004-787L2A
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
SP2 Zone 2/22 Weatherproof
Handset/Speaker Amplifier Station
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 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
SP2 Zone 2/22 configuration is an outdoor,
multi-party, handset/speaker amplifier station
using ac power with RTU control. They are
constructed of black carbon-loaded, glass-
reinforced polyester and are extremely
weatherproof and corrosion resistant. A
number of options are available to add to or
modify station capabilities (see Features and
Options).
SP2 stations connect to an Ethernet network so
the loss of a single station will not adversely
affect the system as a whole. The stations
require a 100 Mbps link to a switch or router
using Category 5 or better cable. To ensure the quality of SP2 audio, it is recommended that SP2 network
traffic be isolated from other devices and that network switches and routers be properly configured 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 Zone 2/22 Weatherproof 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 system as
a whole
mutual provisioning mode allows easy system deployment
high efficiency (>80%) Class D paging amplifier with 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
600-ohm audio I/O with control
configurable priority scheme to allow 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 pre-announcement tone
off-hook and page switch timeout functionality
configurable virtual zoning ability
USB interface for field or bench configuration
universal ac power supply
black carbon-loaded, glass-reinforced polyester enclosure
Options
All SP2 Station options are factory installed.
70/100V constant voltage 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

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Installation
Important Safety Instructions
This equipment is suitable for use in Zone 2/22 hazardous areas OR non-hazardous locations only.
Combinations of equipment in your system are subject to investigation by the local Authority Having
Jurisdiction at the time of installation.
Read, follow, and retain instructions—All safety and operating instructions should be read and
followed before operating the unit. Retain instructions for future reference.
Heed warnings—Adhere to all warnings on the unit and in the operating instructions.
Attachments—Attachments not recommended by the product manufacturer should not be used, as
they may cause hazards. Maximum system cable length is not to exceed two miles.
Servicing—Do not attempt to service this unit by yourself. Opening or removing covers may expose
you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
WARNING
—POTENTIAL ELECTROSTATIC CHARGING HAZARD—Model 10401-
201 Headset and 10416-103 Extension Cord should be used in Group IIB or
Group IIA areas only.
Capacitance values of 140 pF to 580 pF were measured on the external metallic unearthed components of
this equipment. As such, special care must be taken in installation location and environment to address
this hazard. See EN TR50404, “Electrostatics—Code of practice for avoidance of hazards due to static
electricity” for additional information in regards to proper installation and potential hazards.
WARNING
—EXPLOSION HAZARD—Do not disconnect equipment unless power has
been removed or the area is known to be non-hazardous. Avertissement—
Risque d’explosion—Avant de débrancher l'équipement, couper le courant ou
assurer que le secteur est su pour n’être pas hasardeux.
WARNING
—In 24 V dc systems: Under NO condition should this equipment be operated
from a battery charger without the batteries connected.
In 24 V dc systems, most chargers have an unloaded output of 35 to 45 volts that can quickly damage the
equipment designed for nominal 24 volts. The maximum battery voltage should never exceed the
maximum specified input voltage.

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Mounting the Enclosure
Mount the enclosure using the four 0.31-
inch (8 mm) diameter holes located on the
mounting flanges with 5/16-inch (M6)
hardware. The suggested mounting height
for all SP2 station enclosures is 48 inches
(1219 mm) to the center of the bottom
mounting holes of the enclosure. The SP2
Zone 2/22 Station is not supplied with
conduit or cable openings.
When mounting the enclosure, use caution
to avoid damaging the internal components
(see Figure 2 for specific details, including
mounting hole dimensions).
Cable Entries
Stations can be supplied with or without a
stainless steel gland plate located on the
bottom of the rear enclosure. If no gland
plate is present, remove the front panel and
drill or punch wire entry openings in the
rear enclosure. If the station does include a
gland plate, it can be removed from the
rear enclosure for ease of adding entry
holes. Upon reinstalling the gland plate,
torque the #6-32 nuts to 10–12 in·lb (1.13–
1.36 N·m).
The recommended entry is via the
enclosure bottom to prevent moisture from
dripping onto the terminals. Top entry is
not recommended (see Figure 2). There
must be a minimum of ½ inch (13 mm) of
material between entry holes.
Seal all unused openings with proper
fittings per local standards. All metric
cable entry devices and blanking elements
shall be certified for Zone 2/22 applications
with an IP66 rating, suitable for conditions
of use, and correctly installed. Use field
wiring suitable for the ambient
temperature.
Figure 2. Mounting Details and Suggested
Cable Entry Locations

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Opening the Station
Complete the following steps to open the station:
1. Remove the four screws from the front cover and turn it to the left so that the interior surfaces face
you.
2. Keep the wiring and ribbon cables connected.
This configuration presents the easiest access for cable termination and station configuration.
Figure 3. SP2 Zone 2 Station—Interior View
Field Wiring and Configuration
The Zone 2/22 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, contains the 600-ohm audio and Ethernet connections.
All unused openings must be sealed with proper fittings per local standards. All metric cable entry
devices and blanking elements shall be certified for Zone 2/22 applications with an IP66 rating suitable
for conditions of use and correctly installed. Use field wiring suitable for the ambient temperature.
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 local and national codes. Class 2 circuit wiring must be
performed in accordance with NEC 725.55.
NOTE: Shielded Ethernet cable or metallic conduit is required for installation.
Station Ground
The station enclosure must be connected to earth ground.
1. Install a #6 ring lug on the ground conductor.
2. Secure it to the ground terminal located in the upper right corner at the back of the rear enclosure (see
Figure 10).

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Termination PCBA Connections
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
Terminal block TB1 provides termination for the station’s 8 or 16-ohm remote speaker(s).
3. Pull the speaker cable(s) into the enclosure.
4. Connect spade lugs to the wires.
5. Install the speaker wires to terminal block TB1 in accordance with the table below.
6. Torque the terminal block screws to 8–10 in·lb (0.90–1.13 N·m).
7. 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 is provided for a second speaker branch that can be connected in series or
parallel with the primary speaker.

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Table 1. Direct Speaker Connections—TB1
Pin Label Description
TB1-1 + Primary Parallel/SPEAKER A Series—Output
TB1-2 ⏚ Earth Reference
TB1-3 − Primary Parallel/SPEAKER A Series—Output
TB1-4 + Secondary Parallel/SPEAKER B Series—Output
TB1-5 ⏚ Earth Reference
TB1-6 − Secondary 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 70V/100V Speaker Line
Monitoring PCBA replaces the standard
termination board and provides for connection
of 70-volt and/or 100-volt speakers to the SP2
Station. Terminal block TB1 provides
termination for the station’s speaker loop(s).
All speakers must be wired in parallel. One
speaker loop can be monitored by terminating
the return cable to the LINE SPRVN terminals on
TB2 (see Figure 6 and Table 2).
1. Pull the 70 volt and/or 100 volt speaker
cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Connect 100-volt speakers to 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 V and
100 V speaker loops providing termination
for additional speaker loops.
NOTE: An SP2 station can only monitor
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. 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 Primary 100 V Parallel Speakers—Output
TB1-2 COM Earth Reference
TB1-3 70V Primary 70 V Parallel Speakers—Output
TB1-4 100V Secondary 100 V Parallel Speakers—Output
TB1-5 COM Earth Reference
TB1-6 70V Secondary 70 V Parallel Speakers—Output
Figure 6. 70 V/100 V Termination Board Wiring

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RTU Inputs
The standard Termination PCBA contains two auxiliary RTU inputs. The optional 70V/100V termination
board provides for speaker line monitoring and is equipped with just one auxiliary RTU input. These
inputs are terminated at terminal block TB2 (see Figure 5 or Figure 6).
1. Pull the RTU Input cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Install 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 as shown to enable RTU input-cable monitoring (see Figure 7):
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). These outputs can be
reconfigured for dry contact use by removing jumpers JU1 and JU2. Terminations for these outputs are
provided at terminal board TB2 on the Termination PCBA (see Figure 5 or Figure 6).
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. Connect spade lugs to the wires.
3. Install 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 TB2 as shown below to enable cable monitoring.
NOTE: If an RTU Input is used to monitor beacon wiring then it is not available 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 mounted in the Zone 2/22 enclosure. The termination PCBAs
include terminal block TB3 for connecting the local power source to the station (see Figure 5 or Figure
6):
1. Pull the cable from the power source into the enclosure.
2. Connect spade lugs to the wires.
3. Connect the conductors from the ac or dc power source to the appropriate terminals at terminal block
TB3:
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 AudioI/O with Control
SP2 stations provide a 600-ohm audio input to facilitate broadcasting line level audio over the page line.
A control input exists that requires a normally open dry contact closure to enable the station to broadcast
the 600-ohm input audio. 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 is provided that can be used to control when
the remote audio 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-5 or better Ethernet cable into the rear enclosure.
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 the Main PCBA terminal block TB2 (see Figure 9).
NOTE: Shielded Ethernet cable or metallic conduit is required for installation.
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
Opening the Station
Complete the following steps to open the station:
1. Remove the four screws from the front cover and turn it to the left so that the interior surfaces face
you.
2. Keep the wiring and ribbon cables connected.
This configuration presents the easiest access for cable termination and station configuration.
Figure 10. SP2 Zone 2 Station—Interior View
Main PCBA Configuration
Refer to Figure 11 for the switch, jumper, and LED locations on the Main PCBA.
Write Protect (EEPROM) Jumper
NOTE: This jumper should not be changed in the field.
WDOG Enable (Watchdog) Jumper
Watchdog jumper, P11, enables a watchdog feature for software purposes and should not be adjusted in
the field. The default setting is installed.
Boot Enable Jumper
Jumper P8 – BOOT, is required for development purposes and should not be adjusted in the field. The
default setting for this jumper is open.
Reset Switch
Reset switch, S1, allows for rebooting the station to its initial state. All of the latest configuration
settings remain programmed.

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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 will adjust the volume for both. If only 600-ohm audio is utilized
then the volume for the 600-ohm audio must be configured via the CLI (Command Line Interface). 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 SPKR speaker volume potentiometer R36 fully counter-clockwise. An audible test-tone will
be heard from the speaker.
2. Slowly turn R36 clockwise until the desired output volume is reached. The test-tone ceases three
seconds after no adjustment has been made.
This setting can also be configured via USB or Ethernet connection using the CLI.
Receiver Volume
The Receiver Volume is adjusted using the RCVR potentiometer R37. To adjust the volume for the
handset:
1. Remove the handset from the cradle.
2. Turn the RCVR potentiometer R37 fully counter clockwise. An audible test-tone will be heard in the
handset.
3. Slowly turn R36 clockwise until the desired output volume is reached. The test-tone ceases three
seconds after no adjustment has been made.
This setting can also be configured via USB or Ethernet connection using the CLI.

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Group and Station Number Selector Switches
One Group-Number and two Station-Number hex-selector switches are used to configure SP2 stations for
Mutual Provisioning (see Figure 11). Each hex switch has a small arrow to indicate 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]. No two stations can be
assigned the same address.
At least one SP2 station must be configured as a Master Station to utilize Mutual Provisioning in an SP2
system. Master stations must be assigned addresses [0.01], [0.02], or [0.03] using the selector switches.
Master station(s) store the configuration of all SP2 stations on the network. As SP2 stations are powered
on, they retrieve the mutual provisioning configuration from the master station. See Pub. 42004-784, SP2
Configuration Guide, for detailed information on configuring SP2 stations and SP2 system mutual
provisioning. GAI-Tronics’ product documentation is located on the Document Center page of the GAI-
Tronics website. The link to the document center is https://www.gai-tronics.com/docs/default.htm.
Main PCBA Indicators
Power LED
The Power LED located on the Main PCBA illuminates when power is applied to the station indicating
the main board power supply is operational (see Figure 11).
Heartbeat LED
The Heartbeat LED located on the Main PCBA will flash once communication over the LAN is
established to indicate 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 must be off to indicate that a 100 Mbs Ethernet link is active. The activity LED; ACT, will
blink yellow to indicate Ethernet data activity (see Figure 11).
Five Configurable LEDs
Five LEDs are located on the Main PCBA (see Figure 11). These LEDs are configured through firmware.
Information for configuring these LED indicators is provided in the SP2 Configuration Guide, Pub.
42004-784. GAI-Tronics’ product documentation is located on the Document Center page of the GAI-
Tronics website. The link to the document center is https://www.gai-tronics.com/docs/default.htm.
Attaching the Front Cover
After all adjustments have been completed, place the front cover onto the rear enclosure, being careful not
to pinch any cables. Secure the front cover using the four screws and washers provided. 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. For custom
configurations and larger system designs the stations may need to be reconfigured. Refer to Publication
42004-784A for detailed configuration instructions for setting SP2 configuration parameters. A list of
reference documents is located in the reference section of this document.

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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 party line conversation is desired, rotate the selector switch to an unoccupied party line.
3. Press and hold the PUSH TO PAGE button (not necessary when using the optional ALL CALL button).
4. After the short “wait” tone is heard (if configured), speak directly into the microphone to broadcast
your 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 PUSH TO PAGE button and wait for a response on the party line (if requested) or replace
the handset in the cradle.
Party Line Communication
To respond to a page:
1. Turn the selector switch on any SP2 station in the system to the requested party line.
2. Pick up the station handset and party line communication can occur.
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.
Party line conversations are not broadcast over the system speakers. Other individuals can join the
conversation at any time by picking up a handset rotating the selector switch to the party line in use.
Headset Use
When the optional headset feature is available, an operator can initiate a call as follows:
1. Attach the headset assembly to the station.
2. If party line conversation is desired, rotate the selector switch to an unoccupied party line.
3. Press and hold the PUSH TO PAGE button (not necessary when using the optional ALL CALL button).
4. After the short “wait” tone is heard (if configured), speak directly into the microphone to broadcast
your page announcement.
5. Release the PUSH TO PAGE or headset pressbar.
6. 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 allows the user to be hands-free and mobile while maintaining communication.
When connected, the handset microphone is disabled.

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All-Call Button Use
The ALL-CALL option allows an operator to page an
alternate destination that has been 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 party line conversation is desired, rotate the
selector switch to an unoccupied party line.
3. Press and hold the ALL-CALL button.
4. After a short “wait” tone is heard (if
configured), speak directly into the microphone
to broadcast your 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 or wait for a response on the party line (if requested).
Alternate-Page Destination Switch Use
The ALT-PAGE selector switch gives an operator
the ability to page one of five destinations (see
Figure 13). Alternate page destinations must be
software configured for the SP2 station. To initiate
a page using the Alt-Page selector switch:
1. Lift the handset from the cradle.
2. If party line conversation is desired, rotate the
selector switch to an unoccupied party line.
3. Select the desired page destination using the
ALT-PAGE selector switch.
4. Press and hold the PUSH TO PAGE button.
5. After the short “wait” tone is heard (if
configured), speak directly into the microphone
to broadcast your 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 PUSH TO PAGE or headset pressbar.
7. Return the handset to the cradle or wait for a response on the party line (if requested).
Figure 12. All-Call Option Location
Figure 13. Alternate Page Switch
Location

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Maintenance
Troubleshooting
The following table is provided to aid qualified service personnel in troubleshooting problems with the
SP2 Station.
Problem
Solution
station not functional
check wiring and cable terminations
check power supply voltage at TB3 on Termination PCBA
Power LED on Main PCBA illuminated
Heartbeat LED blinking once per second for normal operation
network communication not
functional
verify LNK LED on main PCBA is off
verify SPD LED on main PCBA is off
verify IP connection settings using telnet
ping station IP address from an admin PC
verify network switch settings for Internet Group Management
Protocol (IGMP) snooping and multicast filtering
handset receiver audio is too
high/low
adjust the Receiver Volume
check potentiometer R37 setting
check handset connections
check cable terminations between the Termination and Main
PCBAs
check hookswitch operation
replace handset
speaker volume is too high/low
adjust the Speaker and 600-ohm Audio Output Volume
check potentiometer R36 setting
P2 and P3 Termination PCBA jumper positions incorrect (see
Figure 5)
check speaker wiring configuration on TB1
replace the speaker or driver
RTU output is not functional
verify no monitored output faults exist
check fuse F1 on the Termination PCBA
check connected device operation
RTU input does not function
verify no monitored input faults exist
check RTU Inputs on TB2
check connected device operation