Wheelock TBM-101 User manual

273 Branchport Avenue
Long Branch, N.J. 07740
[phone]
INSTALLATION INSTRUCTIONS
TALKBACK MODULE
MODEL NUMBER: TBM-101
FCC REGULATIONS:
This equipment complies with Part 68 of the FCC Rules. On the back of this equipment is a label that
contains, among other information, the FCC Registration Number and the Ringer Equivalence Number (REN)
for this equipment. You must, upon request provide this information to your telephone company.
The REN is also useful to determine the quantity of devices that you may connect to your telephone line and
still have all of those devices ring when your telephone number is called. In most, but not all areas, the sum of
the REN'S of all devices connected to one line should not exceed five (5.0). To be certain of the number of
devices that you may connect to your line, you may want to contact your local telephone company.
Should the equipment cause harm to the telephone network, the telephone company shall, if possible, notify
the customer that temporary discontinuance of service may be required; however, where prior written notice is
not possible, the telephone company may temporarily discontinue service without notice, if such action is
necessary under the circumstances. The telephone company may make changes in its communication
facilities, equipment and operations procedures, where such action is reasonably required in the operation of
its business and is not inconsistent with the rules and regulations of the Federal Communications Commission.
Do not attempt to repair or modify this equipment. Repairs to this product will be performed by Wheelock Inc.
273 Branchport Ave, Long Branch, NJ 07740 in accordance with Wheelock Inc.'s published Terms and
Conditions of Sale. This equipment should not be used on coin telephone lines. Connection to party line
service is subject to state tariffs.
If trouble is experienced, disconnect this equipment form the telephone line to determine if it is causing the
malfunction. If the equipment is determined to be malfunctioning, its use shall be discontinued until the
problem has been corrected.
APPLICATION INFORMATION:
WARNING: ANY MATERIAL EXTRAPOLATED FROM THIS DOCUMENT OR FROM WHEELOCK MANUALS OR
OTHER DOCUMENTS DESCRIBING THE PRODUCT FOR USE IN PROMOTIONAL OR ADVERTISING CLAIMS, OR
FOR ANY OTHER USE, INCLUDING DESCRIPTION OF THE PRODUCT'S APPLICATION, OPERATION,
INSTALLATION AND TESTING IS USED AT THE SOLE RISK OF THE USER AND WHEELOCK WILL NOT HAVE
ANY LIABILITY FOR SUCH USE.
The TBM-101 is a self contained talkback system containing an omni-directional microphone and a
preamplifier for talkback. It also contains a 4" speaker and a 1 watt amplifier for one-way voice paging,
background music and tone alerting. The TBM-101 is compatible with most EKSU, KSU (1A2) and PABX
systems. The TBM-101 may be used in single zone or multi-zone applications.
Copyright 1987, 1988, 1989, 1990, 1991, 1993, 1994 Wheelock, Inc. All rights reserved.
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Background noise permitting, the TBM-101 will service up to 1000 square feet. See Figure 1 and Chart 1 for
relation between noise and maximum reply distance. The direction of speech is controlled by the calling party
(at the telephone), to prevent false switching of speech direction due to background noise.

CAUTION: These Devices Are Not Intended For Use In Hazardous Locations As Defined By The National Electrical
Code (NEC) And By The National Fire Protection Association (NFPA). Contact Wheelock Inc. for Information On
Explosion-Proof Devices Designed For Hazardous Locations.
Figure 1. Talkback Distance Vs. Ambient Noise Chart 1.
TypicalNoiseLevels
Figure 1A.
Talkback/Paging Connections & Applications
*NOTES:
1. Wheelock's TBM-101 Talkback Module may be connected to a 600 ohm low power audio page port if
the page port allows two-way audio. Check with telephone system manufacturer.
2. If unused CO port requires talk battery to pass audio (most do), then install using a Wheelock RPS-
2406 power supply as shown in Figure 3. For multi-zone applications, a Wheelock Zone Control is
required as an interface.
3. Denotes optional "inhibit" wires. Disconnects (inhibits) Talkback when an all page is initiated.
Applicable only when TBM-101 is used with Wheelock Zone Controls. Use "INH. GND (+)" only when
TBM-101 and Zone Control are using separate power supplies.
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PRIVACY LED INDICATOR OPERATION:
A. When connected to Wheelock's ZC-3 Zone Control Module, the Privacy LED illuminates when the
TBM-101 is in the listen mode.
B. When connected directly to an unused CO port:
- The LED will be illuminated when the TBM-101 is in the idle state. Occasional flicker of the
LOCATION
MACHINE SHOP
MANUFACTURING (NOISY)
PRINTING SHOP
ASSEMBLY LINE
SUPERMARKET
TRANSPORTATION -
WAITING ROOM
OFFICE (NOISY)
SHIPPING/WAREHOUSE
RESTAURANT
DEPARTMENT STORE
BANK (PUBLIC AREA)
OFFICE (QUIET)
OFFICE/DOCTORS -
WAITING ROOM
HOTEL LOBBY
DOCTORS EXAM ROOM
dB
90
80
80
75
75
75
70
70
70
65
65
55
55
55
55

LED is normal (caused by sudden noise).
- When in the two-way communication (hands free talkback) mode, the privacy LED will be
illuminated only when in the listen mode.
SPECIFICATIONS:
PARAMETERS MIN. NOM. MAX. UNITS
SUPPLY VOLTAGE -20 -24 -28 VDC
OPERATING CURRENT 80 150 mA
AUDIO INPUT LEVEL -15 10 dBm
T & R INPUT IMPEDANCE 600 OHMS
SWITCHING SPEED 200 mSec
AUDIO OUTPUT LEVEL @ 1 METER 95 dB
OUTPUT POWER 1 WATT
TALKBACK REPLY DISTANCE @ 50 dB AMBIENT 50 FT.
INSTALLATION INFORMATION:
The unit should be located away from noise producing equipment such as fans, air conditioner units, etc.
Performance will be determined by a combination of ambient (background) noise level, and distance - See
Figure 1.
MOUNTING INFORMATION:
The TBM-101 is designed to mount on a desk, or the surface of a wall. Remove the top cover by pushing on
the latch at the bottom of the housing base with a small screwdriver (See Figure 2). To mount the unit, space
the 2 mounting screws provided horizontally on 2.750" centers (See Figure 2B). To mount the unit, space the
2 mounting screws provided horizontally on 2.750" centers (See Figure 2A). Ideal mounting height is 6-12 feet
above floor level. Connect wires as specified in wiring on page 5, and then snap cover back onto base. Be
sure that the base sides line up between the cover sides and the 4 fingers on the cover sides. See Figure 2B.
Figure2. Figure2A.
NOTE:
SIDES OF BASE LINE UP BETWEEN SIDE WALL
AND FINGERS ON COVER SHOWN.
Figure 2B.
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CONNECTION DIRECTLY TO AN UNUSED CO PORT:
When connecting a TBM-101 directly to an unused CO port requiring talk battery to pass audio (most do),
install with a Wheelock RPS-2406 power supply as shown in Figure 3.
NOTE
Use This Installation For No More Than One TBM-101
Figure 3: Unused Co Port Installation

Figure 3A: Simplified Schematic
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WIRING: (See Figure 3A.)
- Make sure the 24VDC Power Supply is disconnected from 115VAC Power Source..
- Connect 24VDC power supply "+" and "-" to TB1 terminals 1 and 2 respectively.
- Connect Tip and Ring from telephone system, or Wheelock Zone Control Modules "T out" and "R out"
to TBM-101's terminals.
- If connected directly to telephone system, disable TB Inhibit by shorting TB1 terminals 5 and 6 with a
jumper wire.
- For connection to an unused CO port requiring talk battery, install as shown in Figure 3.

- When used with Wheelock's ZC-3 Zone Control:
(A) Connect TB1 terminals 6 to the required ZC-3 zone INH terminal (TB2, terminals 13, 14, or 15).
(B) If TBM-101 and ZC-3 use separate power supplies, then also connect TB1 terminal 5 to the
ZC-3's TB1 terminal 4.
- Make sure to route the wires through the two cable clamps attached inside the unit.
- Recheck all wiring.
- Connect speaker wires to pins marked "speaker P1 (red) and P2 (black)". Then snap cover onto base.
- Connect the power supply to 115VAC power source.
- Test the system using the following operation instructions.
OPERATING INSTRUCTIONS:
- Pick up telephone hand set and press the CO line button, or dial the number assigned to paging.
When used with Wheelock Zone Control, next touch dial number assigned to zone in which
TBM-101 has been connected, and listen for page alert tone.
- Paging and talkback is now possible. The calling party has control of the conversation (direction of
speech).
- Talkback is possible only while LED is illuminated and calling party is silent.
- Talkback (respond hands free) at a voice level normally use (in that location) to respond to another
person at the some distance.
- Adjust page volume control and internal talkback microphone sensitivity control (phone listening
volume) to desired levels.
TROUBLE SHOOTING:
CONDITION CHECK
1. No sound in page mode. 1)Check that volume control is turned up (clockwise).
2)Check presence and polarity of 24VDC and GND.
3)Check audio presence and level on TIP and RING at
TBM-101, and if necessary also at the audio source.
(-15dBM is minimum audio level required at TBM-
101).
2. Low volume in page mode. 1)Check that volume control is turned up (clockwise).
2)Check audio presence and level on TIP and RING at
TBM-101, and if necessary also at the audio source.
(-15dBM is minimum audio level required at TBM-
101).
3. Listening volume at phone is too high 1)Set the sensitivity control to the suitable listening too low in
talkback mode. level.
Some telephone systems require that CO trunk port (loop start) or CO line port be equipped with a trunk card,
page card or equipment. Consult the telephone manufactures system manual for equipment or programming
required.
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Limited Warranty
Wheelock products must be used within their published specifications and must be PROPERLY specified, applied, installed, operated, maintained and
operationally tested in accordance with these instructions at the time of installation and at least twice a year or more often and in accordance with local,
state and federal codes, regulations and laws. Specification, application, installation, operation, maintenance and testing must be performed by qualified
personnel for proper operation in accordance with all of the latest National Fire Protection Association (NFPA), Underwriters' Laboratories (UL), National
Electrical Code (NEC), Occupational Safety and Health Administration (OSHA), local, state, county, province, district, federal and other applicable
building and fire standards, guidelines, regulations, laws and codes including, but not limited to, all appendices and amendments and the requirements
of the local authority having jurisdiction (AHJ). Wheelock products when properly specified, applied, installed, operated, maintained and operationally
tested as provided above are warranted against mechanical and electrical defects for a period of one year from date of installation or 18 months from
date of manufacture (as determined by date code), whichever first occurs. Correction of defects by repair or replacement shall be at Wheelock's sole
discretion and shall constitute fulfillment of all obligations under this warranty. THE FOREGOING LIMITED WARRANTY SHALL IMMEDIATELY

TERMINATE IN THE EVENT ANY PART NOT FURNISHED BY WHEELOCK IS INSTALLED IN THE PRODUCT. THE FOREGOING LIMITED
WARRANTY SPECIFICALLY EXCLUDES ANY SOFTWARE REQUIRED FOR THE OPERATION OF OR INCLUDED IN A PRODUCT. WHEELOCK
MAKES NO REPRESENTATION OR WARRANTY OF ANY OTHER KIND, EXPRESS, IMPLIED OR STATUTORY WHETHER AS TO
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR ANY OTHER MATTER.
USERS ARE SOLELY RESPONSIBLE FOR DETERMINING WHETHER A PRODUCT IS SUITABLE FOR THE USER'S PURPOSES, OR WHETHER
IT WILL ACHIEVE THE USER'S INTENDED RESULTS. THERE IS NO WARRANTY AGAINST DAMAGE RESULTING FROM MISAPPLICATION,
IMPROPER SPECIFICATION, ABUSE, ACCIDENT OR OTHER OPERATING CONDITIONS BEYOND WHEELOCK'S CONTROL.
WHEELOCK DOES NOT WARRANT THAT THE OPERATION OF THE SOFTWARE WILL BE UNINTERRUPTED OR ERROR-FREE OR THAT THE
SOFTWARE WILL MEET ANY OTHER STANDARD OF PERFORMANCE, OR THAT THE FUNCTIONS OR PERFORMANCE OF THE SOFTWARE
WILL MEET THE USER'S REQUIREMENTS. WHEELOCK SHALL NOT BE LIABLE FOR ANY DELAYS, BREAKDOWNS, INTERRUPTIONS, LOSS,
DESTRUCTION, ALTERATION, OR OTHER PROBLEMS IN THE USE OF A PRODUCT ARISING OUT OF OR CAUSED BY THE SOFTWARE.
THE LIABILITY OF WHEELOCK ARISING OUT OF THE SUPPLYING OF A PRODUCT, OR ITS USE, WHETHER ON WARRANTIES, NEGLIGENCE,
OR OTHERWISE, SHALL NOT IN ANY CASE EXCEED THE COST OF CORRECTING DEFECTS AS STATED IN THE LIMITED WARRANTY AND
UPON EXPIRATION OF THE WARRANTY PERIOD ALL SUCH LIABILITY SHALL TERMINATE. WHEELOCK IS NOT LIABLE FOR LABOR COSTS
INCURRED IN REMOVAL, REINSTALLATION OR REPAIR OF THE PRODUCT BY ANYONE OTHER THAN WHEELOCK OR FOR DAMAGE OF ANY
TYPE WHATSOEVER, INCLUDING BUT NOT LIMITED TO, LOSS OF PROFIT OR INCIDENTAL OR CONSEQUENTIAL DAMAGES. THE
FOREGOING SHALL CONSTITUTE THE SOLE REMEDY OF THE PURCHASER AND THE EXCLUSIVE LIABILITY OF WHEELOCK.
IN NO CASE WILL WHEELOCK'S LIABILITY EXCEED THE PURCHASE PRICE PAID FOR A PRODUCT.
Limitation of Liability
WHEELOCK'S LIABILITY ON ANY CLAIM OF ANY KIND, INCLUDING NEGLIGENCE AND BREACH OF WARRANTY, FOR ANY LOSS OR DAMAGE
RESULTING FROM, ARISING OUT OF, OR CONNECTED WITH THIS CONTRACT, OR FROM THE MANUFACTURE, SALE, DELIVERY, RESALE,
REPAIR OR USE OF ANY PRODUCT COVERED BY THIS ORDER SHALL BE LIMITED TO THE PRICE APPLICABLE TO THE PRODUCT OR PART
THEREOF WHICH GIVES RISE TO THE CLAIM. WHEELOCK'S LIABILITY ON ANY CLAIM OF ANY KIND SHALL CEASE IMMEDIATELY UPON THE
INSTALLATION IN THE PRODUCT OF ANY PART NOT FURNISHED BY WHEELOCK. IN NO EVENT SHALL WHEELOCK BE LIABLE FOR ANY
CLAIM OF ANY KIND UNLESS IT IS PROVEN THAT OUR PRODUCT WAS A DIRECT CAUSE OF SUCH CLAIM. FURTHER, IN NO EVENT,
INCLUDING IN THE CASE OF A CLAIM OF NEGLIGENCE, SHALL WHEELOCK BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE PRECEDING
LIMITATION MAY NOT APPLY TO ALL PURCHASERS.
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