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Product Description

The 4000 Series POTS Splitter is used to connect high-speed data lines and voice circuits to local loops using standard Telco 50 pin connectors.

The Comtest 4000 Series ADSL2+ POTS Splitter Shelves are available in 1U, 3U and 4U offering 48, 144, and 192 ports respectively.

The NA4000 is a 900:600 Ohm POTS splitter card, compliant with ANSI T1.413 and G.992.1, G.992.3 and G.992.5. Each card has standard level 2 protection to protect against power crosses and lightning surges, greatly reducing the need for manual intervention, and an expensive truck roll.

With the emergence of ADSL2+ and VDSL enhanced services like video, the POTS Splitter is a vital part of the network. The innovative design of the 4000 series addresses specific issues that affect video such as crosstalk and ring-trip problems.

The 4000 Series Splitters used in conjunction with Comtest’s NID-01 CPE splitter, virtually eliminates modem re-syncing errors, ensuring error free video reception. With crosstalk better than 70dB, distortion introduced from adjacent channels is virtually eliminated.

The 4000 series shelves provide make before break life-line POTS. Whenever a card is removed from the shelf, POTS service will be uninterrupted, ensuring critical services like 911 remains available to the end user.

Connectivity options are available to allow the 4000 shelves to meet your exact fit and form requirements. Ease of installation is ensured, regardless of your cable dressing requirements.

Product Benefits

  • Improved crosstalk for Video applications
  • ADSL2+ and VDSL compatible
  • 19 or 23 inch rack mountable
  • Electrically and Temperature hardened to handle remote locations
  • Make before Break Life line POTS
  • Connects 48, 144, or 192 high speed lines
  • DC Blocking and Signature Circuit optional
  • Self-resetting lightning/surge supression


Mounting Rack adapters for 483mm (19") or 584mm (23") shelves
Operating Temperature -40 to +65 °C
-40 to 149 °F
Physical Interface Three (3) standard 50-pin Amphenol-type Telco connectors per card for DSLAM, PSTN, and TELCO Local Loop connections.
Capacity 24 Subscriber Loops per card
Protection Secondary protection via current and over voltage devices
Compliance UL/CSA, FCC Part 68, CS 03, NEBS, GR 1089, CE
Options DC Blocking and Signature Circuit

Email Icon info@comtestnetworks.com Phone Icon 1 877 369 5499

Name Datasheet Installation Guide Order number
NA-4000V-02 ILP, Top Level View PDF SA-4001-0002
EU-4007V, 24 Port 600Ω ETSi/POTS Splitter Card View PDF SA-4007-0016
4048 Shelf, Top Level View PDF View PDF SA-4048-7100
4192 Shelf Assembly, Top Level View PDF View PDF SA-4192-7400
EU-4100V-01, Top Level View PDF SA-4101-0001
4144 Shelf, Top Level View PDF View PDF SA-4144-7300
4144 System 5 Splitter Chassis View PDF View PDF SA-4144-7334