Valcom V-136RT Service Manual

V-136RT

36 STATION ROTARY-TONE INTERCOM

GENERAL

The V-136RT is a single-path dial select
microprocessor controlled intercom and page control
unit used with a 1A2 key system to provide 36 zones
of bell or buzzer signalling.

The V-136RT control unit has received an FCC type
KX registratio n; designed to be used with FCC
registered key telephone systems. In accordance with
FCC rules with applicable tariffs, this paging unit
may only be installed with the authorization of the
host system. Installations may be made by Valcom,
Inc., an authorized agent of the same, equipment
manufacturers, telephone companies, registered
telephone refurbishers, and those qualified for
installation of FCC registered systems under FCC
Rules Section 68.215. The FCC Registration
Number, BAF9I7-69366-KX-N, will be listed in the
affidavits filed with the telephone company; it will be
also be recorded in the system log kept by installation
and maintenance personnel. The local telephone
company is to be notified when this intercom unit is
installed.

SPECIFICATIONS

Features

• Dial tone

• Ringback tone

• Last number diale d rering

• Conference call (tone only)

• Combined rotary or tone dialing

• Dial/ringback tone mute

• Mixed bell and buzzer operation

• Single or double burst signaling

Numbering Plan

• The dialing codes are 0, 5 - 39

Dimensions/Weight

• 7.1"H x 5.9"W x 2.1"D

(18.03cm x 14.99cm x 5.33cm)

• 3.25 lbs. (1.47 kg)

VSP-V-136RT

Power Requirements

Voltage Working Limits Current
Talk Battery -21.5 to –26 Vdc 90mA
Signal Battery -21.5 to –26 Vdc 350mA

Electrical Characteristics

Parameter Working Limits
Input Imp. T and R 600 ohm (incl. inst.)
Signal Contacts 1.5 amps
Signal Time 1 second
Dial Pulses 8-12 PPS

60-40 Break ratio +/- 10%

Tone Freque ncies Industry Standard

Frequency
Bandwidth 3%
Twist 6db
Detect 40MS
Interdigital Time 40M S

Environmental
Temperature 0o to 50
Humidity 0 to 85%

Non-precipitating

o

Issue 7

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INSTALLATION

Precautions

All precautions have been taken at the factory to
insure that the equipment functions properly when
installed correctly. Please observe the following
precautions before applying power to the equipment
or the equipment may be damaged and the warranty
voided.

• Unplug the power supply before making any

connections to the control unit.

• Do not locate the control unit closer than 18

inches or further than 5 feet from the power
supply.

• Do not use a lamp tester to check signals, use a

voltmeter. A lamp tester when first applied is a
short circuit to electronic circuits.

• Do not apply power to the control unit until all

connections have been double-checked.

Mounting

Mount the V-136RT on a 7" KTU mounting, relay
rack or on the wall.

Connections

• Fasten a 25 pair cable to the unit and terminate

all leads on a 66 type block per Figure 1, 2 or 3.

• Strap 1 ground, B ground, lamp ground, 18 Vac

and 105 Vac signal grounds common at power
supply.

being signalled.

To rering the same station, press the "*" button. The
station will be signalled as long as the * button is
held. To rering rotary, dial "1". The station will be
signalled for one second each time a "1" is dialed.

For conference calling (tone only), dial the first
station number, press the "#" button to receive dial
tone, then dia l the next station number .

General Method of Operation

When the calling party goes off-hook, the switch
hook contacts in the telephone set close the tip and
ring to form a loop. Loop closure detection logic
then operates the lamps at all stations and returns dial
tone to the telephone set. Dial detection circuitry will
then receive dialing information and operate relays
and/or circuitry to supply signalling voltage to the
desired station.

TECHNICAL ASSISTANCE

When trouble is reported, verify that:

• All telephone sets are in proper working order

• Power is being supplied to the unit

• There are no broken connections at the

connecting block

• The conductors of color coded cables are

terminated in the proper order

• Refer to Figure 1 for connections; use the chart

in Figure 1 to set the option programming.

NOTE: Option switches 3 and 4 must be in the off

position for proper oper a tion with bells or
buzzers.

• Refer to Figure 2 for connecti ons for 36 stat ions

of buzzer signalling. This figure may also be
used for 36 stations of bell signalling by
replacing the 18 Vac buzz voltage with 105
Vac ring volta ge.

• Refer to Figure 3 for connect i ons for mixed

signalling with 20 stations of bells and 16
stations of buzzers.

OPERATION

To make an inte rcom call, go off-hook and d ial the
number of the desired station. Dial tone will be
broken after the first number is dialed. A one second
ringback tone will indicate that the called station is

If trouble still exists, additional checks should be
made using the follo wing equipment:

• Voltmeter

• Tone-dial single-line instrument (for tone-dial

systems)

• Telephone Test Set

• Clip leads

Before proceeding further, check the voltages at the
connecting block. An undetected blown fuse or low
voltage will cause improper control operation. DC
voltage measurements are made with respect to (+)
ground.

If a spare unit is available, continue to troubleshoot
by substituting the spare unit for the suspected unit.

If the trouble has not been located, refer to the
Troubleshooting Chart. Identify the symptoms and
perform the corrective actions indicated. After all the
suggested tests have been performed, the trouble still
exists, call Valcom at [phone] and ask for

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Technical Support, or call [phone] for
Valcom 24-hour Automated Support or visit our
website at h ttp :www.valcom.com.

TROUBLESHOOTING CHART

PROBLEM CORRECTIVE ACTION

Valcom equipment is not field repairable. Valcom,
Inc. maintains service facilities in Roanoke, VA.
Should repairs be necessary, attach a tag to the unit
clearly stating company name, address, phone
number, contact person, and the nature of the
problem. Send the unit to:

Valcom, Inc.

Repair and Return Dept.

5614 Hollins Road

Roanoke, VA 24019-5056

No side tone.

No dial tone.

Check "A" battery connections, polarity. and voltage.

Check option switch 1. Check "B" battery connections, polarity, and
voltage.

No lamps.

Check lamp supply voltage and input. Verify that grounds are common
at power supply.

No audible signal at station dialed.

Check signal voltage at supply and frame locations. Verify bell and
buzzer returns are common at power supply.

Double signaling.

Continuous signaling

Check option switch 2.

Check option switch 3.

Stations 10 through 29

Stations 30 through 39,

Check option switch 4.

0, and 5 thr ough 9

VALCOM LIMITED WARRANTY

Valcom, Inc. warrants its products to be free from defects in materials and w orkmanship under conditions of normal use and service
for a period of one year from the date of shipment. The obligation under this warranty shall be limited to the replacement, repair or
refund of any such defective device within the warranty period, provided that:

1. inspection by Valcom, Inc. indicates the validity of the claim,

2. the defect is not the result of damage, misuse, or negligence after the original shipment.

3. the product has not been altered in any way or repaired by others and that factory sealed units are unopened (A service

4. freight charges for the return of products to Valcom are prepaid,

5. all units ‘out of warranty’ are subject to a service charge. The service charge will cover minor repairs (Major repairs will be

This warranty is i n lieu of and excludes all oth er warranties, expressed or implied, and in no event shall Valcom, In c. be
liable for any anticipated profits, consequential damages, loss of time or other losses incurred by the buyer in connection
with the purchase, operation, or use of the product.

This warranty specifically excludes damage incurred in shipment. In the event a product is received in damaged condition, the
carrier should be notified immediately. Claims for such damage should be filed with the carrier involved in accordance with the
F.O.B. point.

charge plus parts and labor will be applied to units defaced or phy sically damaged),

subject to additional charges for parts and labor).

Headquarters: In Canada

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