JK Audio InlinePatch User manual

Telephone Interface Products
INLINE PATCH
Telephone Audio Interface
PATCH
JK Audio

2 3
Description
TheInlinePatchgivesyouaccesstotheaudiofrombothsidesof
yourtelephonecall. Simplyinstallthislittlebox“inline”between
thetelephonewalljackandthebaseofyourtelephone. Youcan
use any single-line residential (analog) corded or cordless
telephoneorifavailablethedata/modemportonadigitalorPBX
telephone. Addapairofpowered speakers and everyone in the
room will hear both sides of the conversation. Separate volume
controls ensure that both sides of the call are heard at the same
level. Inlinepatchisnotthe same as a speakerphone. Only the
person with the telephone handset can talk while everyone else
listens in. You can pass around the handset with more control
overyourteleconferenceorIVRdemo.
You can also use Inline Patch to add audio to your
conversation, or send audio into the phone line instead of your
voice.
Operating
Setup for use with residential / analog telephones:
1. Unplug the telephone cord from the base of your
telephone.
2. Plug that telephone cord into the jack on the Inline Patch
marked“PhoneLine”.
3. Using the telephone cable we have provided, plug one
end into your Inline Patch marked ‘Phone” and the other
endofthecableintoyourtelephone.
4. Connectyouraudioequipmenttothe3.5mmand/orXLR
lineinputandoutputjacksontheInlinePatch.
5. Connect the power supply to the back of the Inline
Patch.
Inline Patch To analog RJ11
Wall Jack
Audio Equipment
To send audio into
phone line
Analog Telephone
Powered Speakers or audio
equipment to receive audio
from phone line

2 3
Description
TheInlinePatchgivesyouaccesstotheaudiofrombothsidesof
yourtelephonecall. Simplyinstallthislittlebox“inline”between
thetelephonewalljackandthebaseofyourtelephone. Youcan
use any single-line residential (analog) corded or cordless
telephoneorifavailablethedata/modemportonadigitalorPBX
telephone. Addapairofpowered speakers and everyone in the
room will hear both sides of the conversation. Separate volume
controls ensure that both sides of the call are heard at the same
level. Inlinepatchisnotthe same as a speakerphone. Only the
person with the telephone handset can talk while everyone else
listens in. You can pass around the handset with more control
overyourteleconferenceorIVRdemo.
You can also use Inline Patch to add audio to your
conversation, or send audio into the phone line instead of your
voice.
Operating
Setup for use with residential / analog telephones:
1. Unplug the telephone cord from the base of your
telephone.
2. Plug that telephone cord into the jack on the Inline Patch
marked“PhoneLine”.
3. Using the telephone cable we have provided, plug one
end into your Inline Patch marked ‘Phone” and the other
endofthecableintoyourtelephone.
4. Connectyouraudioequipmenttothe3.5mmand/orXLR
lineinputandoutputjacksontheInlinePatch.
5. Connect the power supply to the back of the Inline
Patch.
Inline Patch To analog RJ11
Wall Jack
Audio Equipment
To send audio into
phone line
Analog Telephone
Powered Speakers or audio
equipment to receive audio
from phone line

Operating(continued)
SetupforusewithPBXphonesystems:
Setup for use with PBX phone systems is the same as analog
telephones with one exception. Instead of connecting the
phone line jack of the Inline Patch to a wall jack, you will
connect to the data / modem jack of your PBX phone. You will
still need a regular analog telephone connected to the phone
jack of the inline patch. When dialing out you will need to take
the necessary steps to get a direct connection to the main
analog phone line (example: dialing 9 + 9 + phone number).
You will not physically use your PBX phone while operating the
Inline Patch. It simply acts as your connection to the telephone
line. Dialing, speaking, etc. will be done through the separate
analog telephone.
4 5
Operating (continued)
Output Jacks
The Inline Patch has three audio output jacks on the back
panel. The 3.5 mm “stereo” jack has the phone line audio on
the left channel and your voice on the right channel. The
second 3.5 mm jack has both sides of the call combined on
both left and right channels. You may use either a mono or
stereo plug in this jack. The third output is a balanced male
XLRjack. TheXLRjackcontainsonlytheaudiocomingfrom
thephonelinewithanominal20dBoftrans-hybridloss.
There are three output controls on the front of the Inline
Patch. From Phone adjusts the level of your voice on both
output mini jacks. “From Line” adjusts the level of the
audio coming from the phone line on all three output jacks.
The Separation control is used to achieve the best match
between your voice and the audio coming from the phone
line. When you send your voice into the phone line it
comes back to you mixed in with the audio from the other
side of the call, although it will be about 20 dB lower than
your original transmit level. This means that if your audio
is sent at 0 dB, and you receive the caller’s audio at 10 dB,
then you would have 10 dB of separation between your
voice and the caller audio. The goal is to have a minimum
amount of your voice coming back to you from the phone
line. To fine tune the separation, first connect your audio
equipment (powered speakers, mixer w/ VU meter, etc.) to
the mixed mono output jack on the back of the Inline
Patch. Next turn the From Phone control all the way down
and the From Line control all the way up. Now place a
phone call. Without any audio coming from the other end
of the call, hold down a touch tone on your telephone
while adjusting the Separation control to find the most
quiet position. Now turn the From Line control to about
12:00 and use the From Phone control to bring your voice
up to a suitable level.
Inline Patch
To digital or
PBX Wall Jack
To Data /
Modem
Port
Analog Telephone
Digital or PBX
Telephone
Audio Equipment
To send audio into
phone line Powered Speakers or audio
equipment to receive audio
from phone line

Operating(continued)
SetupforusewithPBXphonesystems:
Setup for use with PBX phone systems is the same as analog
telephones with one exception. Instead of connecting the
phone line jack of the Inline Patch to a wall jack, you will
connect to the data / modem jack of your PBX phone. You will
still need a regular analog telephone connected to the phone
jack of the inline patch. When dialing out you will need to take
the necessary steps to get a direct connection to the main
analog phone line (example: dialing 9 + 9 + phone number).
You will not physically use your PBX phone while operating the
Inline Patch. It simply acts as your connection to the telephone
line. Dialing, speaking, etc. will be done through the separate
analog telephone.
4 5
Operating (continued)
Output Jacks
The Inline Patch has three audio output jacks on the back
panel. The 3.5 mm “stereo” jack has the phone line audio on
the left channel and your voice on the right channel. The
second 3.5 mm jack has both sides of the call combined on
both left and right channels. You may use either a mono or
stereo plug in this jack. The third output is a balanced male
XLRjack. TheXLRjackcontainsonlytheaudiocomingfrom
thephonelinewithanominal20dBoftrans-hybridloss.
There are three output controls on the front of the Inline
Patch. From Phone adjusts the level of your voice on both
output mini jacks. “From Line” adjusts the level of the
audio coming from the phone line on all three output jacks.
The Separation control is used to achieve the best match
between your voice and the audio coming from the phone
line. When you send your voice into the phone line it
comes back to you mixed in with the audio from the other
side of the call, although it will be about 20 dB lower than
your original transmit level. This means that if your audio
is sent at 0 dB, and you receive the caller’s audio at 10 dB,
then you would have 10 dB of separation between your
voice and the caller audio. The goal is to have a minimum
amount of your voice coming back to you from the phone
line. To fine tune the separation, first connect your audio
equipment (powered speakers, mixer w/ VU meter, etc.) to
the mixed mono output jack on the back of the Inline
Patch. Next turn the From Phone control all the way down
and the From Line control all the way up. Now place a
phone call. Without any audio coming from the other end
of the call, hold down a touch tone on your telephone
while adjusting the Separation control to find the most
quiet position. Now turn the From Line control to about
12:00 and use the From Phone control to bring your voice
up to a suitable level.
Inline Patch
To digital or
PBX Wall Jack
To Data /
Modem
Port
Analog Telephone
Digital or PBX
Telephone
Audio Equipment
To send audio into
phone line Powered Speakers or audio
equipment to receive audio
from phone line

6 7
Operating (continued)
The hybrid circuitry in the Inline Patch can provide a nominal 20
dB of transmit / receive isolation. When using the stereo jack
with stereo speakers, the 20 dB isolation will give you
substantial left / right separation. The separation on FM stereo
is typically around 20 dB.
SendSide(ToPhoneLine)
The Inline Patch includes a balanced female XLR jack and a
3.5mm (1/8” mono mini jack) to send audio down (or into) the
telephone line. These jacks can be connected to an audio output
such as the headphone output jack on a tape recorder, or the line
output of a PC audio card, CD player or audio mixer. If you would
like to use a microphone to add extra audio to the call, you will first
need to add an amplifier to your microphone so that the signal is
boosted to line level. You can use both the XLR and the mini jack
input at the same time, and add it to the audio coming from the
handsetmicrophone. Thelevelof the audio you send through the
input jacks into the phone line can be adjusted with the Send
control. Note that this audio will come back mixed with the caller
audio,sobesurenottooverpowerthecaller’svoicewithyourown
audio.
OffHook-NormSwitch
This switch allows you to seize the phone line without using your
telephone. This switch can be remotely operated using your own
switch contacts connected to the back of the unit. Simply wire a
3.5mmplugtoanormallyopenswitch. Ashort acrosstipandring
onastereoplugwilltakethephonelineoff-hook. Youcanalsouse
a3.5mmmonoplug.
Note: Seizing the phone line activates the internal circuitry of
the Inline Patch, essentially “turning it on”. The green LED on
the front panel only indicates that the unit is receiving power.

6 7
Operating (continued)
The hybrid circuitry in the Inline Patch can provide a nominal 20
dB of transmit / receive isolation. When using the stereo jack
with stereo speakers, the 20 dB isolation will give you
substantial left / right separation. The separation on FM stereo
is typically around 20 dB.
SendSide(ToPhoneLine)
The Inline Patch includes a balanced female XLR jack and a
3.5mm (1/8” mono mini jack) to send audio down (or into) the
telephone line. These jacks can be connected to an audio output
such as the headphone output jack on a tape recorder, or the line
output of a PC audio card, CD player or audio mixer. If you would
like to use a microphone to add extra audio to the call, you will first
need to add an amplifier to your microphone so that the signal is
boosted to line level. You can use both the XLR and the mini jack
input at the same time, and add it to the audio coming from the
handsetmicrophone. Thelevelof the audio you send through the
input jacks into the phone line can be adjusted with the Send
control. Note that this audio will come back mixed with the caller
audio,sobesurenottooverpowerthecaller’svoicewithyourown
audio.
OffHook-NormSwitch
This switch allows you to seize the phone line without using your
telephone. This switch can be remotely operated using your own
switch contacts connected to the back of the unit. Simply wire a
3.5mmplugtoanormallyopenswitch. Ashort acrosstipandring
onastereoplugwilltakethephonelineoff-hook. Youcanalsouse
a3.5mmmonoplug.
Note: Seizing the phone line activates the internal circuitry of
the Inline Patch, essentially “turning it on”. The green LED on
the front panel only indicates that the unit is receiving power.

8 9
Specifications
Inputs (to phone line):
Balanced Connector Female XLR
Input Impedance 1 k ohms
Level 250 mV RMS (-10 dBm nom.)
Line Connector 1/8” (3.5mm) mono mini jack
Input Impedance 20 k ohms
Level 250 mV RMS (-10 dBm nom)
Outputs:
Balanced Connector Male XLR
Output Impedance 50 ohms
Level 500 mV RMS (+12 dBm max.)
Stereo Connector 1/8” (3.5mm) stereo mini jack
Output Impedance 50 ohms
Level 250 mV RMS (+12 dBm max.)
Mono Connector 1/8” (3.5mm) stereo mini jack
Output Impedance 50 ohms
Level 250 mV RMS (+12 dBm max.)
Remote: Connector 1/8” (3.5mm) TRS stereo jack
Connect tip to ring to go
Off-hook.
Phone line: Connector RJ11C
Isolation 1500 volts
Phone: Connector RJ11C
Voltage 32 VDC

8 9
Specifications
Inputs (to phone line):
Balanced Connector Female XLR
Input Impedance 1 k ohms
Level 250 mV RMS (-10 dBm nom.)
Line Connector 1/8” (3.5mm) mono mini jack
Input Impedance 20 k ohms
Level 250 mV RMS (-10 dBm nom)
Outputs:
Balanced Connector Male XLR
Output Impedance 50 ohms
Level 500 mV RMS (+12 dBm max.)
Stereo Connector 1/8” (3.5mm) stereo mini jack
Output Impedance 50 ohms
Level 250 mV RMS (+12 dBm max.)
Mono Connector 1/8” (3.5mm) stereo mini jack
Output Impedance 50 ohms
Level 250 mV RMS (+12 dBm max.)
Remote: Connector 1/8” (3.5mm) TRS stereo jack
Connect tip to ring to go
Off-hook.
Phone line: Connector RJ11C
Isolation 1500 volts
Phone: Connector RJ11C
Voltage 32 VDC

10 11
FCC Registration
Your new JK Audio product has been registered with the
Federal Communications Commission (FCC). This product
complies with the standards in Part 68 of the FCC rules.
1. Connectionandusewiththenationwidetelephone
network
The FCC requires that you connect this telephone
equipmenttothenationaltelephonenetworkthrougha
USOCRJ-11Cmodulartelephonejack.
This equipment may not be used with Party Line
ServiceorCoinTelephoneLines.
Thisequipmentishearingaidcompatible.
2. Informationforthetelephonecompany
Uponrequestfromyourlocaltelephonecompany,you
arerequiredtoprovidethefollowinginformation:
a) The "line" to which you will connect the telephone
equipment(thatis,yourtelephonenumber),and
b) The telephone equipment's FCC registration
number. This can be found on the bottom of your
telephoneequipment,and,
c) the ringer equivalence number (REN) for this
equipment.
The REN is used to determine the quantity of devices
which will be connected to the telephone line.
Excessive RENs on the telephone line may result in
the devices not ringing in response to an incoming
call. In most, but not all areas, the sum of the RENs
should not exceed 5.0. To be certain of the number of
devicesthatmaybeconnectedtotheline,asde- termined
bythetotalRENs,contactthelocaltelephonecompany.
FCCRegistration(continued)
3. RepairInstructions
If it is determined that your telephone equipment is
malfunctioning, the FCC requires that it not be used
and that it be unplugged from the modular outlet until
the problem has been corrected. Repairs to this
telephone equipment can only be made by the
manufactureroritsauthorizedagentsorbyotherswho
maybeauthorizedbytheFCC. Forrepairprocedures,
follow the instructions outlined under the warranty
sectionofthemanual.
4. Rightsofthetelephonecompany
Iftelephoneequipmentiscausingharmtothenetwork,
the telephone company may temporarily discontinue
your telephone service. If possible, they'll notify you
before they interrupt service. If advanced notice isn't
practical, you'll be notified as soon as possible. You'll
be given the opportunity to correct the problem, and
you'll be informed of your right to file a complaint with
theFCC.
Your telephone company may make changes in its
facilities, equipment, operations or procedures that
could affect the proper functioning of your JK Audio
product. If such changes are planned, you'll be notified
by your telephone company.