Product User Manual
Contents
1. Four IFB is covered by a 2 year warranty to be free from defective workmanship and materials In the event that the Four IFB needs repair you must call us to get an authorization and then carefully pack and ship it to us You will pay for shipping to us and we will pay for return back to FO u r l gt B you UPS ground No free repairs will be made if the defect was caused by misuse weather conditions or other cause except for defective workmanship or materials M i ulti Line Phone Bridge THERE ARE NO EXPRESSED OR IMPLIED WARRANTIES WHICH EXTEND BEYOND THE WARRANTY HERE MADE User Guide 10 06 JK Audio Inc 1311 E 6th Street Sandwich IL 60548 USA JK Audio Voice 815 786 2929 Toll Free 800 JK Audio Fax 815 786 8502 Info jkaudio com www jkaudio com Copyright 2006 JK Audio All Rights Reserved Important Safety Instructions 1 a p D 10 11 12 13 14 15 Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not expose this unit directly to water Although this unit is designed to be as moisture repellent as possible it is not in tended to be used unprotected in the rain under water etc This unit is neither 100 water proof nor water tight When used in a wet or damp environment battery power is recommended Do not place liquid filled containers on the unit such as water glasses coffee cups etc Clean only with dry cloth Install in2. accordance with manufacturer s instructions Do not install near heat sources such as radiators heat regis ters stoves or other devices that produce excessive heat Do not defeat the safety purpose of the grounding type plug The grounding prong is provided for your safety If the provided plug does not fit in your outlet consult an electrician for replace ment of the obsolete outlet Use only the 3 prong grounded AC cable provided with the unit when connecting to AC power Use of a surge suppressor for AC power and phone lines is rec ommended Unplug this unit during lightning storms or when unused for long periods of time Protect the power cord from damage at all times Special atten tion should be paid to the location where the cable connects to the unit and to the AC outlet Refer all servicing to qualified personnel 2 FCC Registration b The telephone equipment s FCC registration number This can be found on the bottom of your telephone equipment 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 devices that may be connected to the line as determined by the total RENs contact the local teleph
3. ed Block Diagram x 7 oO D Oo l Is 17 l z l z 83 lg I T I 3 wy 3 D i3 D i D asx Z lt 2 lt ax A A A I fn a 2 A el y 83 2 25 9 i i a iz 4 4 4 g 4 O J o 4D a wk S 3 MZ SETS oe N C 3 5 O O J amp D 3 gt X lt I w N gt Z op KR w N Quick Setup Guide 5 Turn on the Power switch The power LED should light red 6 Rotate the Monitor selector switch to the desired Line position Line 1 phone line connected to RJ 11 marked Line 1 7 Press the Add button This will take the selected line off hook The corresponding Line LED will light green 8 Dial the call with the DTMF keypad You may now communicate with the called party on Line 1 through the Monitor handset or equipment connected to the Monitor Send and Receive SLR jacks optional Repeat steps 6 8 for Lines 2 4 Quick Setup Guide continued 9 Use the IFB 1 4 rotary switches to select which phone line audio will be sent to the corresponding IFB XLR output jack Example Setting IFB 1 rotary switch to Line 4 will send audio from phone line 4 to the IFB XLR output 1 10 Adjust audio levels as needed using corresponding volume controls Operation Audi
4. ign protects the volume controls from physical damage When used in a wet or damp environment battery power is recommended IFB is a broadcast industry acronym which stands for Interruptible Fold Back The IFB signal is typically a Program Line PL signal from the studio console Quick Setup Guide 1 Connect AC power to the unit with the provided AC cable The AC power LED should light green Pen e Saree tee USA wwe Asus Com 2 Connect up to four ana log POTS telephone lines to the RJ 11 jacks Connect a handset to the monitor handset jack and or connect the Monitor Send and Receive XLR jacks to your audio equipment for commu nication FIFS Phe Brie gene konio m NOTE You cannot connect a mic directly to the Monitor Send SLR This is a line level input GOOO gt sw Ld Sa were AsO om 4 Connect the IFB XLR output s to your audio equipment for distribution of IFB audio feeds Specifications Inputs Line Outputs Line Handset Phone Line Isolation Ringer Frequency Response Power Auxiliary Power Size Weight Balanced Female XLR 20k ohm 4 dBu max 5 Balanced Male XLR 600 ohm Line level 4 dBu max RJ 22 handset jack biased for electret handset not included 4 RJ11C 1500 VAC 0 4B REN Telephone Side 200 3600 Hz 120 240 VAC 50 60 Hz Internal power supply Single 9 VDC battery 10 x 9 75 x 2 3 5 pounds 17 Simplifi
5. l balanced XLR outputs the unit is equipped with one balanced XLR line level monitor input and one balanced XLR monitor output Each IFB output and the monitor input output jacks may be separately connected to one of the four analog phone lines through the use of rotary line selector switches A telephone handset may also be connected for use with the monitor line selector switch Level of each of the six XLR jacks is adjustable individually with independ ent volume controls Individual on hook off hook function for each phone line is con trolled by the Monitor Add and Drop switches The phone line to be controlled with these switches is determined by the Monitor ro tary line selector switch On hook off hook relay condition will be maintained regardless of whether an active POTS line is physically connected to the unit or if the unit is in a powered on state or not Temporary power loss will not disconnect an active phone line The position of the monitor rotary line selector switch determines which line is added or dropped Calls may be placed directly from the unit with the integrated DIMF keypad No external dialer is needed Four IFB is designed to be used in a variety of environments and weather conditions Although the unit is not waterproof all con trols and components are dust and moisture resistant A non removable hinged cover protects the unit s selector switches add drop buttons and keypad while the enclosure des
6. lect the corresponding line with the Monitor rotary selector switch You may then answer the call by pressing the Add button The corresponding line LED will now light constant green NOTE There is no audible ringer on the Four IFB Dropping Calls To drop an active call you must first select the corresponding phone line 12 After use be sure to turn off the power switch with the Monitor rotary selector switch Pressing the Drop button will The battery will lose charge if the power switch is left now disconnect the call on the selected Monitor phone line The corre on and there is no AC power source present even if sponding line LED will now become unlit the unit is not in use Operator Communication You may send and receive audio through a handset connected to the Monitor handset jack and or through the Monitor XLR line input and out put Audio from the handset and the Monitor XLR input will be sent down the currently selected Monitor line as well as any IFB output se lected to the same line Audio from the Monitor phone line will be sent into the Monitor handset and the Monitor XLR output Example Phone line 1 is selected as Monitor via the Monitor rotary selector switch IFB 1 and IFB 2 rotary selector switches are set to line 1 IFB 3 and IFB 4 rotary selector switches are set to line 2 Audio from the telephone handset microphone and from the Monitor XLR input will be sent down phone line 1 and out of the Monitor XLR output hand
7. lume control Controls the level of audio sent into the phone line from the Monitor Send XLR input 4 Line LED indicators These bi color LED indicators will inform Four IFB you of line state at a glance PHONE BRIDGE Unlit When the relay that controls the line is in the on hook state the LED will remain unlit Green OK A green LED means the relay that controls the line is off hook and an active phone line is physically connected Red Warning If the LED lights red this means that there is a problem with the line The red LED indicates that the relay that controls the line is in its off hook state but there is no active phone line present These LED s also function as visual ring indicators The LED will flicker green when ring voltage is present on the corresponding phone line JK Audio 5 Green LED AC indicator This LED will light green whenever the unit is connected to an active AC power source regardless of on off power switch position 6 Red LED power indicator This LED will light red when unit power is in the On position If the unit is operating on battery power this LED will also indicate the condition of the battery The LED will only light red on battery power when voltage level is gt 7 VDC 16 17 18 19 20 7 Power on off switch 12 9 Features continued Four IFB Phone Bridge Sond monitor eceive IFB 4 IFB 3 IFB 2 IFB 1 ak lelelele e 100 240 VAC S0 60H 0 84 JK Audio i
8. ne Sandwich Illinois USA www jkaudio com 10 Features continued 8 9 10 11 12 13 AC power jack 100 240 VAC power jack Monitor Send XLR input Line level input for sending audio down the phone line designated as Monitor This is a line level input and will NOT accept a microphone directly To use this input to send audio you must provide a line level signal from a device such as a mixer or mic pre amp Monitor Receive XLR output Line level output containing audio from the phone line designated as Monitor IFB 1 4 XLR outputs Line level outputs containing audio from the phone line corresponding to each IFB 1 4 selector switch position Monitor handset jack RJ 22 handset jack biased for handsets with electret type microphones This jack allows communication to the phone line designated as Monitor Phone line jacks 1 4 RJ 11 telephone line jacks for connection to analog POTS telephone lines 1
9. nitor The IFB connectors are listen only The four IFB outputs can be set to receive audio from any of the four telephone lines but they cannot send audio Only the Monitor handset or line level input from your mixer etc can talk to the called parties on the telephone lines or to the IFB outputs 15 Dialing Calls To dial a call connect your analog telephone line s to the RJ 11 phone line jacks on the side of the unit With the Monitor rotary selector switch 11 To drop a call rotate the Monitor selector switch to the select the phone line you wish to dial Press the Add button to take the desired Line position Line 1 phone line connected to selected Monitor line off hook The selected Monitor line LED indicator the RJ 11 marked Line 1 will light green You may now dial the call with the DTMF keypad All Press the Drop button transmit sources as well as the input signal from the hybrid will be This will drop hang up muted while DTMF tones are being transmitted into the phone line the call on the selected l l line The corresponding If the LED lights red when the add button is pressed this means that Line LED will go dark there is no active phone line connected to the corresponding RJ 11 jack Answering Calls You will be alerted to an incoming call with an LED visual ring indicator for that line When you are receiving an incoming call the correspond ing line LED will flicker green To answer this call you must first se
10. o from phone line 1 will be sent to the telephone handset speaker Monitor XLR output IFB 1 XLR output and IFB 2 XLR output IFB 3 and 4 XLR outputs will contain audio from phone line 2 if active Power Loss Four IFB provides the option of using a 9VDC battery as backup to AC power If AC power is lost the 9VDC battery will become the active power source until AC power is restored FAQ s Can I connect a microphone to the input No the Monitor Send XLR input is a line level input so you cannot use a microphone without a pre amp This input is for connection of a line level audio signal only If have the unit plugged in to an AC power source while am using it will it recharge the battery No this device does not have a rechargeable battery You should only use an alkaline battery Battery life will depend on how many devices are connected and how the unit is being used Can talk to all four IFB outputs at the same time No the Monitor handset and Monitor Send XLR inputs can only be connected to one IFB output at a time using the Monitor selector switch hear the called party on the handset but they can t hear me This unit was designed to work only with an electret type handset Try using an AT amp T Sony or Lucent handset Can Iuse the Four IFB to conference the phone lines together No the telephone lines cannot be bridged together on this device How does each IFB line talk to the mo
11. one company 3 Repair Instructions lf 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 manufacturer or its authorized agents or by others who may be authorized by the FCC For repair procedures follow the instructions outlined under the warranty section of the manual 4 Rights of the telephone company If telephone equipment is causing harm to the network 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 the FCC 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 19 FCC Part 15 Compliance This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equi
12. pment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense Changes or modifications not expressly approved by JK Audio can void the user s authority to operate the equipment 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 Connection and use with the nationwide telephone network The FCC requires that you connect this telephone equipment to the national telephone network through a USOC RJ 11C modular telephone jack This equipment may not be used with Party Line Service or Coin Telephone Lines This equipment is hearing aid compatible 2 Information for the telephone company Upon request from your local telephone company you are required to provide the following information a The line to which you will connect the telephone equipment that is your telephone number and 18 Haligeye oratley es Four IFB is a four position analog telephone line interface de signed specifically to provide flexible listen only IFB for television field production use In addition to the four line leve
13. set speaker IFB 1 XLR output and IFB 2 XLR output 14 i 14 IFB 1 4 selector switches These rotary switches control from which phone line audio passes to the corresponding IFB XLR output jack For instance IFB 1 rotary switch set to position 4 would send audio from phone line 4 to the IFB 1 output 15 DTMF keypad Used to dial calls on the Monitor phone line 16 Monitor selector switch This rotary switch determines which phone line is designated as Monitor For instance setting this switch to position 4 would allow phone line 4 to take advantage ee Chi Monitor of all Monitor functions i Lines i 4336 acy ert aint E i 4 BCH 5 ermid j j a k s 17 Add button Pressing this button takes the Monitor phone line off hook 18 Drop button Pressing this button drops hangs up any call on the Monitor phone line 19 Control cover Hinged control cover protects rotary switches buttons and keypad Cover locks into place with 1 2 turn of lock ing latch 20 Battery Slide out compartment for a single 9 VDC battery All active functions of the Four IFB require that AC or battery power is present and that the Power Switch is in the On position 1 IFB Receive volume controls Controls the level of audio present on the corresponding IFB XLR output jacks 2 Monitor Receive volume control Controls the level of audio pre sent on the Monitor Receive XLR output jack 3 Monitor Send vo
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