A splitter electronically isolates the lower frequencies of the telephone signal from the higher frequencies of the DSL signals. Splitters are the main device used when running a homerun (dedicated wiring for the DSL signal) because they also physically isolate the DSL and POTS wiring. Splitters are more robust than the standard in-line microfilters supplied in the self install kits and eliminate the need to have filters on every phone.

Four main types are available:
External Splitters - Encased in separate, weather-proof enclosures for stand alone installation.
Internal NID Splitters - Designed to fit completely inside a residential NID (Network Interface Device).
Home Security Alarm Splitters - Designed to work with RJ-31X alarm system connections. More information is available here.
INI Splitters - Designed for apartments/condominiums that use an INI instead of a NID. More information is available here.

Note: The appearance of these links in no way constitutes any endorsement and they are provided as a convenience only. No representation is made as to the suitability of these or any other commercial links included here.

eBay is a great source for new splitters at very good prices. Also, several retailers sell to the general public. Please check the following links:

•Hometech Solutions
•TXINET
•Santa Cruz Electronics
•HippoVariety
•ADSLProducts
•TII Authorized Vendors


Siecor/Corning External Splitter

Bourns Internal Splitter

TII Internal Splitter

Keptel Internal Splitter

Siecor Dual Line Internal Splitter

Wilcom Splitter

Excelsus RJ-31X Security Alarm Splitter

Siecor INI Splitter (Wallplate)

Siecor INI Splitter (Wall Mount)

Andy Houtz DSL

got feedback? got feedback?

Any feedback you provide is sent to the owner of this FAQ for possible incorporation and shown publically as well.

by Andy Houtz edited by FAQFixer
last modified: 2006-12-21 23:52:17