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September 08, 2026 4 min read
Quick reference guide for the Channel Vision AB-318, a Micro-USB Bluetooth wall-dock for A-Bus audio systems.
Quick reference guide for the Channel Vision AB-318 — a Micro-USB Bluetooth wall-dock for A-Bus® audio systems. This manual is heavily illustrated; the diagrams below and the full downloadable PDF cover complete wiring and installation details.
The AB-318 is an on-wall Bluetooth Micro-USB docking station for CAT5 audio systems. The non-skid pad helps hold the music player in place, and its elegant, contemporary styling makes it a good choice for anyone who wants to enjoy their music without defacing the wall.
Disconnecting: Disconnect the Bluetooth connection from your device's Bluetooth menu.
Connecting to another device: Disconnect the current pairing, then scan and pair with the new device using the same default PIN (1234).
3-gang installation: A single-gang control keypad can be installed next to the AB-318 in a 3-gang junction box — install the keypad and single-gang trim plate in the far left position, leave off the right-side flange and trim piece, then install the dock in the left side of the 3-gang j-box (it overlaps and snaps into the single-gang trim plate).
Note: Maximum charging voltage is 5VDC / 500mA. Do not plug in a tablet computer to this dock — doing so can damage either device and will void the warranty.
| Problem | Troubleshooting |
|---|---|
| Not linking with Bluetooth device, or linked but no audio plays | Restart the Bluetooth dock; restart the Bluetooth device; make sure the Bluetooth device is in play mode. |
| Audio quality issues | Verify CAT5 cable is wired to the TIA-568A standard at both ends (mis-wiring can distort sound or damage components). Verify speakers are connected in phase. If no audio, confirm the source is playing and the keypad power button is on. |
| Hum in system | Plug all system parts into the same outlet, or try a ground-lifting plug — different electrical grounds across components can cause an audible 60Hz hum. Solution: use a common-ground circuit. |
Additional tips: The AB-318 charges a Micro-USB device — the device's screen should show it's charging (press the volume buttons on the keypad to confirm power/LEDs are lit). Max recommended wire length between wall dock and CAT5 audio hub is 250 ft.; longer runs may work but aren't recommended due to power loss. For Micro-USB device issues unrelated to docking, contact the device manufacturer.
Warning: Do not turn the volume all the way up if no audio is present — doing so could damage speakers if audio reconnects.
Specifications subject to change without notice. Tested to comply with FCC standards (Part 15).
Channel Vision Technology will repair or replace any defect in material or workmanship occurring during normal use, with new or rebuilt parts, free of charge in the USA, for one year from the date of original purchase — a no-hassle warranty, no mail-in card needed. Does not cover shipping damage, acts of God, failures caused by third-party products, or failures due to accident, misuse, abuse, or alteration. Extended only to the original purchaser when purchased from an authorized reseller, with proof of purchase required. Mail-in service: call (800) 840-0288 toll free for a Return Authorization number.
Channel Vision products are not intended for use in medical, lifesaving, life-sustaining, or critical environment applications.
Channel Vision Technology · 234 Fischer Avenue, Costa Mesa, California 92626 USA · (714) 424-6500 · (800) 840-0288 · fax (714) 424-6510 · techsupport@channelvision.com · www.channelvision.com
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