Description
If your PABX, KSU, or channel bank stations are losing calls or struggling with weak signals over long cable runs, the Viking LLA-4 four line long loop adapter solves the problem by converting low talk battery voltage analog lines into full, reliable 48V lines with a powerful 20Hz sine wave ring signal.
The LLA-4 handles up to four analog stations at once, electrically isolating each PABX or KSU station from its extended loop while passing Caller ID, CPC signals, hook switch flash, DTMF, and pulse dialing through without interruption. A built-in ground screw terminal adds improved surge and lightning protection, giving your extended lines an extra layer of defense against voltage spikes. Selectable ring protocols make it easy to match the unit to your existing system without rewiring or reconfiguring equipment.
Installation is straightforward with no programming required, making the LLA-4 a practical solution for telecom technicians, building managers, or IT teams extending analog station ports to remote offices, outbuildings, or long-distance off-premise locations served by ISDN terminal adapters, channel banks, or legacy KSU systems.
Our Expert Take: The LLA-4 is the kind of workhorse product that quietly solves a real problem — degraded station performance over long cable runs. If you are extending analog ports from a PABX to a warehouse, detached office, or remote access point, the electrical isolation alone is worth it, since it protects your main system from loop faults on the extended side. The selectable ring protocols are a practical touch that saves time when matching ring cadence to different downstream devices.
Key Features
- Converts four low talk battery voltage or weak ringing analog lines into standard 48V lines with powerful 20Hz sine wave ring signal
- Provides 48VDC talk battery and 20Hz, 10 REN sine wave ringing per line
- Supports four long line and off-premise extension (OPX) capabilities for PABX and KSU analog stations, ISDN terminal adapters, and channel banks
- Electrically isolates PABX or KSU station from the extended loop
- Passes Caller ID information, CPC signals, hook switch flash, DTMF, and pulse dialing
- Selectable ring protocols to match your existing system
- Ground screw terminal for improved surge and lightning protection and earth ground reference
- No programming required — easy to install
Technical Specifications
- Number of Lines: 4
- Talk Battery Output: 48VDC
- Ring Signal: 20Hz, 10 REN sine wave
- Dialing Compatibility: DTMF (touch tone) and pulse dialing
- Signaling: Passes CPC signals, hook switch flash, and Caller ID
- Ring Protocols: Selectable
- Surge Protection: Ground screw terminal for lightning and surge protection