Four IFB Multi Line Phone Bridge User Guide JK Audio
Important Safety Instructions 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not expose this unit directly to water. Although this unit is designed to be as moisture repellent as possible, it is not intended 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. 6.
Introduction Four IFB is a four position analog telephone line interface designed specifically to provide flexible listen only IFB* for television field production use. In addition to the four line- level 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.
Quick Setup Guide 1. Connect AC power to the unit with the provided AC cable. The AC power LED should light green. 2. Connect up to four analog (POTS) telephone lines to the RJ-11 jacks. 3. Connect a handset to the monitor handset jack and/or connect the Monitor Send and Receive XLR jacks to your audio equipment for communication. NOTE: You cannot connect a mic directly to the Monitor Send SLR. This is a line level input. 4.
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.
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.
Quick Setup Guide (continued) 11. To drop a call, rotate the Monitor selector switch to the desired Line position. Line 1 = phone line connected to the RJ-11 marked Line 1. Press the Drop button. This will drop (hang up) the call on the selected line. The corresponding Line LED will go dark. 12. After use, be sure to turn off the power switch. The battery will lose charge if the power switch is left on and there is no AC power source present, even if the unit is not in use.
Features 1 2 8 3 4 5 6 7
Features Operation (continued) 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 present on the Monitor Receive XLR output jack. 3. Monitor Send volume 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 you of line state at a glance.
Features (continued) 8 9 10 12 11 13 10
Features Operation (continued) (continued) 8. AC power jack - 100-240 VAC power jack 9. 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. 10. Monitor Receive XLR output - Line level output containing audio from the phone line designated as Monitor. 11.
Features (continued) 14 16 17 18 15 19 20 12
Features Operation (continued) (continued) 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.
Operation 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, select the phone line you wish to dial. Press the Add button to take the selected Monitor line off-hook. The selected Monitor line LED indicator will light green. You may now dial the call with the DTMF keypad.
Operation Operation (continued) Audio 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.
Simplified Block Diagram 1 RJ- 11 2 3 4 DTMF K eypad XLR Input Hold relay and Hybrid Hold relay and Hybrid Hold relay and Hybrid Hold relay and Hybrid XLR Output Monitor Selector Monitor Section Line Selectors Level Controls JK Audio, Inc.
Specifications Operation (continued) Inputs: Line: Balanced Female XLR, 20k ohm, +4 dBu max Line: (5) Balanced Male XLR, 600 ohm, Line level, +4 dBu max Outputs: Handset: RJ-22 handset jack biased for electret handset (not included) Phone Line: (4) RJ11C Isolation: 1500 VAC Ringer: 0.4B REN Frequency Response: Telephone Side 200 - 3600 Hz Power: 120-240 VAC, 50-60 Hz Internal power supply Auxiliary Power Single 9 VDC battery Size: 10" x 9.75" x 2" Weight: 3.
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 equipment 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.
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.
Warranty 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 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.
