GAI-Tronics SP2 User manual

Pub. 42004-792L2A
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 Fiber Hazardous-Area
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
Mounting the Enclosure.........................................................................................................................4
Cable Entries...........................................................................................................................................5
Opening the Station ................................................................................................................................6
Field Wiring and Configuration............................................................................................................6
Station Ground......................................................................................................................................6
Termination PCBA Connections ..........................................................................................................7
Main PCBA—600-Ohm Audio I/O with Control...............................................................................11
Fiber Termination Board.....................................................................................................................12
Settings and Adjustments..............................................................................................................13
Opening the Station ..............................................................................................................................13
Main PCBA Configuration ..................................................................................................................14
Write Protect (EEPROM) Jumper.......................................................................................................14
WDOG Enable (Watchdog) Jumper ...................................................................................................14
Boot Enable Jumper............................................................................................................................ 14
Reset Switch........................................................................................................................................14
Speaker and 600-ohm Audio Output Volume..................................................................................... 15
Receiver Volume ................................................................................................................................15
Group and Station Number Selector Switches....................................................................................15
Main PCBA Indicators.........................................................................................................................16
Power LED..........................................................................................................................................16
Heartbeat LED....................................................................................................................................16
Ethernet Connection LEDs .................................................................................................................16
Five Configurable LEDs.....................................................................................................................16
Attaching the Front Cover...................................................................................................................16
Programming ................................................................................................................................16
Operation.......................................................................................................................................17

Table of Contents Pub. 42004-792L2A
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
Standard Handset Paging.....................................................................................................................17
Party Line Communication..................................................................................................................17
All-Call Button Use...............................................................................................................................18
Alternate-Page Destination Switch Use...............................................................................................18
Maintenance..................................................................................................................................19
Troubleshooting....................................................................................................................................19
Service and Spare Parts........................................................................................................................20
Specifications ................................................................................................................................20
Power......................................................................................................................................................20
Ethernet .................................................................................................................................................20
RTU........................................................................................................................................................20
Audio......................................................................................................................................................21
Mechanical.............................................................................................................................................22
Approvals...............................................................................................................................................22

Pub. 42004-792L2A
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 Fiber Hazardous-Area
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 Fiber Hazardous Area SP2
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.
A number of 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 system as a
whole. The stations require a 100 Mbps
link to a switch or router using fiber optic
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 Fiber SP2
stations and network switches are determined by the type of fiber optic cable used in the installation.
Figure 1. SP2 Station Front View

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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 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
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 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
durable cast aluminum enclosure
Options
All SP2 Station options are factory installed.
24 V dc power supply
speaker amplifier only (no handset)
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
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.
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.
Specific Conditions of Use: Flameproof joints are not to be repaired in the field. If the flame path is
damaged, the enclosure is to be removed from service and replaced with a new properly working
enclosure. The screws used for the body to cover must have a yield stress equal to or greater than
1100 MPa.
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.
Class 2 circuit wiring must be performed in accordance with NEC 725.55.
These enclosures must be installed by trained, qualified and competent personnel. Installation must
comply with state and national regulations, as well as safety practices for this type of equipment.
WARNING
—Do not install this equipment in hazardous areas other than those indicated
on the approval listing in the “Specifications” section of this manual. Such
installation may cause a safety hazard and consequent injury or property
damage.
The mounting location must be flat and provide proper clearance, rigidity and strength to support the
enclosure and all contained devices. The enclosures are equipped with factory-installed hinges. The
enclosures should be mounted with hinges on the left.
WARNING
—Do not mount the enclosure with hinges on the top or bottom side.
Securely fasten the enclosure to the mounting location, using 3/8-inch (10mm) diameter steel mounting
bolts and washers, or washer head bolts.
WARNING
—Do not disconnect equipment while energized.
Ensure proper grounding to protective earthing.
Inspect and clean the machined flange flame joint surfaces of both the cover and box. Surfaces must be
smooth, free of nicks, scratches, dirt, or any foreign particle build-up that would prevent a proper seal.
Surfaces must seat fully against each other to provide a proper explosion-proof joint. Clean surfaces by
wiping with a clean lint-free cloth.
Apply a light coat of Killark “LUBG” lubricant to flange surfaces and close the cover. Install and tighten
all cover bolts to 30 ft.-lbs. Make certain no cover bolts are omitted. Use only those bolts supplied with
the enclosure.

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Mounting the Enclosure
NOTE:The mounting surface must be able to support the weight of the aluminum enclosure. See the
Specifications section for the weights and dimensions of the unit.
Figure 2. Enclosure Mounting Details
The enclosure must be securely fastened with 3/8-inch (10mm) diameter steel mounting bolts located on
all four mounting feet. Stainless steel hardware is recommended in outdoor applications.
NOTE:Refer to the Killark Installation, Operation, and Maintenance Data Sheet enclosed with the unit
for additional information.
The suggested mounting height for all station enclosures is 48 inches (1219 mm) to the bottom of the
enclosure.

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Cable Entries
Refer to Figure 3 for standard NPT conduit entries and Figure 4 for standard metric cable gland entries.
Ensure all unused openings are sealed with proper fittings per local standards. All metric cable entry
devices and blanking elements shall be certified in type of explosion protection flameproof enclosure “d”
with an IP66 rating, suitable for conditions of use, and must be correctly installed. Use field wiring
suitable for the ambient temperature. Any conduit NPT plugs (blanking elements) will need to be
explosion-proof with a Type 4X rating.
Figure 3. Standard NPT Conduit Entries
Figure 4. Standard Metric Cable Gland Entries

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Opening the Station
Complete the following steps to open the station:
1. Remove all cover bolts from the enclosure.
2. Swing the front door open to access the internal PCBAs.
3. Keep the wiring and ribbon cables connected.
Figure 5. SP2 Fiber Hazardous Area Station—Interior View
Field Wiring and Configuration
The SP2 Fiber Hazardous Area 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 the 600-ohm audio connection. The fiber termination
board is mounted on top of the Main PCBA and provides fiber optic termination for the Ethernet SFP
Transceiver.
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. Class 2 circuit wiring must
be performed in accordance with NEC 725.55.
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 lower right corner at the back of the rear enclosure (see
Figure 5).

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Termination PCBA Connections
Install all connections as indicated in the following sections:
Figure 6. SP2 Standard Termination PCBA
(Optional 70V/100V Termination PCBA Similar)
Direct SpeakerConnection and Jumper Settings
Terminal block TB1 provides termination for the station’s 8 or 16-ohm remote speaker(s).
1. Pull the speaker cable(s) into the enclosure.
2. Connect spade lugs to the wires.
3. Install the speaker wires to terminal block TB1 in accordance with the table below.
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 6 and Figure 7).
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
+
Parallel/SPEAKER ASeries—Output
TB1-2
⏚
Earth Reference
TB1-3
−
Parallel/SPEAKER ASeries—Output
TB1-4
+
Parallel/SPEAKER BSeries—Output
TB1-5
⏚
Earth Reference
TB1-6
−
Parallel/SPEAKER BSeries—Output
Figure 7. 8/16-ohhm Speaker Impedance Configuration
and AC/DC Termination at TB3

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RTUInputs
The standard Termination PCBA contains two auxiliary RTU inputs. These inputs are terminated at
terminal block TB2 (see 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 2).
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 8).
Table 2. Standard Termination Board
RTU Input Termination—TB2
Pin
Label
Function
TB2-1
+
RTU 1
INPUT
RTU Input 1 +
TB2-2
−
RTU Input 1 −
TB2-3
+
RTU 2
INPUT
RTU Input 2 +
TB2-4
−
RTU Input 2 −
Figure 8. RTU Input Wiring Configurations for Cable Monitoring

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RTUOutput
Two Form “C” contacts are provided to power a beacon (see Figure 9). These outputs can be
reconfigured for dry contact use by removing jumpers JU1 and JU2. Termination for these outputs is
provided at terminal block TB2 on the Termination PCBA (see 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 3).
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 9).
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 3. 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
COMA
Common Output A
TB2-8
COMB
Common Output B
TB2-9
NO A
Normally Open Output A
TB2-10
NO B
Normally Open Output B
Figure 9. Supervised Output Wiring—TB2

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Power
The ac or optional dc power supply is mounted on the Termination PCBA. The termination PCBA
includes terminal block TB3 for connecting the local power source to the station (see 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 (see Table 4 or Table 5).
Table 4. AC Power—TB3
Table 5. 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 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 6 and Figure 10).
4. Connect the pluggable terminal block to terminal block receptacle TB1.
Table 6. 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 10. SP2 Main PCBA (Fiber)
Fiber Termination Board
The Fiber Termination PCBA (shown below) is mounted on top of the Main PCBA. Exact fiber
termination is installation dependent because the fiber optic cable and SFP (Small Form-factor Pluggable)
Transceivers used in SP2 system installations are customer supplied. Here are the basic steps for
terminating the fiber optic cable to the SP2 station:
1. Insert the SFP transceiver into the SFP receptacle (see Figure 11 and Figure 12).
2. Route the terminated fiber with the appropriate connectors into the station and over to the Fiber
Termination PCBA.
3. Wrap the fiber cable around the Excess Fiber Spool.
4. Plug the fiber connector into the SFP (see Figure 12).
Figure 11. Fiber Termination PCBA

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Figure 12. SFP Transceiver Insertion and Fiber Plug-in
Settings and Adjustments
Opening the Station
Complete the following steps to open the station:
1. Remove all cover bolts from the enclosure.
2. Swing the front door open to access the internal PCBAs.
3. Keep the wiring and ribbon cables connected.
Figure 13. SP2 Fiber Hazardous Area Station—Interior View

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Main PCBA Configuration
Refer to Figure 14 for switch, jumper, and LED locations on the Main PCBA.
Figure 14. Main PCBA (Front and Rear Views)
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 reboots the station to its initial state. All configuration settings remain programmed.

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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.
NOTE:—This setting is overridden if it is configured for the station using the SP2 Console in a mutually
provisioned system. See the SP2 Configuration Guide, Pub. 42004-784 located on the GAI-
Tronics website at https://www.gai-tronics.com.
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 R37fully 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.
NOTE:—This setting is overridden if it is configured for the station using the SP2 Console in a mutually
provisioned system. See the SP2 Configuration Guide, Pub. 42004-784 located on the GAI-
Tronics website at https://www.gai-tronics.com.
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 14). 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 GAI-Tronics website at
https://www.gai-tronics.com.

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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 14).
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 14).
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 14).
Five Configurable LEDs
Five LEDs are located on the Main PCBA (see Figure 14). 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.
Attaching the Front Cover
After all adjustments have been completed, inspect and clean the machined flange joint surfaces of both
the cover and box. Surfaces must be smooth, free of nicks, scratches, dirt or any foreign particle build-up
that would prevent a proper seal. Surfaces must seat fully against each other to provide a proper
explosion-proof joint. Clean surfaces by wiping with a clean lint-free cloth.
Apply a light coat of Killark “LUBG” lubricant to flange surfaces and close the cover. Install and tighten
all cover bolts to 30 ft·lb. Make certain no cover bolts are omitted. Use only those bolts supplied with
the enclosure.
It may become necessary to re-terminate some or all of the enclosures in a system. If so, strip the wires
back to clean copper and connect only one wire to each connector to allow for easier future
troubleshooting.
NOTE:—Refer to the Killark Installation, Operation, and Maintenance Data Sheet enclosed with the unit
for additional information.
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.

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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 PRESS TO PAGE button (not necessary when using the optional ALL-CALL button).
4. After the short pre-announcement tone is heard (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 PRESS 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.

Pub. 42004-792L2A
SP2 Fiber Hazardous-Area Handset/Speaker Amplifier Station Page 18 of 22
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All-Call Button Use
Use the ALL-CALL option button to page an alternate
destination that has been programmed for the station
(see Figure 15). 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.
The ALL-CALL button eliminates the need to press
the PRESS TO PAGE button when paging.
4. After the short pre-announcement 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 when finished.
Alternate-Page Destination Switch Use
Use the ALT-PAGE option selector switch to page one
of five alternate destinations that have been
programed for the station (see Figure 16). Alternate
page destinations 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. Select the desired page destination using the ALT-
PAGE selector switch.
4. Press and hold the PRESS TO PAGE button.
5. After the short pre-announcement 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 PRESS TO PAGE button.
7. Return the handset to the cradle or wait for a response on the party line (if requested).
Figure 15. All-Call Option Button
Figure 16. Alt-Page Option Button