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Cisco Small Business Voice Gateways and ATAs

Connecting Phone Extensions to SPA2100

Document ID: 108789

Updated: Dec 12, 2008

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Contents

Introduction
How many telephone units can I connect on each FXS port of the SPA2100?
Related Information

Introduction


This article is one in a series to assist in the setup, troubleshooting, and maintenance of Cisco Small Business products.

Q. How many telephone units can I connect on each FXS port of the SPA2100?

A.

You can connect a few phones to the SPA2100's Line/FXS port, but the total ringer equivalency number (REN) of the telephone should not exceeds three RENs per Line/FXS port. REN indicates how much load is required for a phone to recognize a ring. Check your telephone documentation for REN specifications. You may also locate REN on the underside label of the analog phone itself.

Related Information

Updated: Dec 12, 2008
Document ID: 108789