USRobotics 5686G 56K Fax Modem USR5686G With RJ9 and RJ45 Cables 143598633017 but there is no signal

but there is no signal from channel 3 and 4

and manifold

Includes Semi Fisheye Professional Lens as pictured

Manufacturer Cisco Model Number AIR-VPN-4400-K9 SKU 19-05917 Ref 23-97359

Manufacturer Tektronix Model Number P6330 SKU 19-33441 Ref 23-43701

USRobotics 5686G 56K Fax Modem USR5686G With RJ9 and RJ45 Cables 143598633017 but there is no signalCondition Used Description This item is fully tested and in excellent working order. Item will come with a 30 Day Warranty. Cosmetically in good condition showing minor scuffs scratches blemishes from previous use. Includes Fax Modem, RJ9 and RJ45 Cables as pictured. No additional items or accessories are included. Photos are of the actual unit for sale. Inventory is on hand and ready to ship. Please feel free to message us with any questions you may