This document introduces the features and characteristics of Cisco ATA 186 and Cisco 188, including product specifications and installation and configuration methods.
This guide provides detailed instructions for installing, configuring, and maintaining the Cisco ATA 186 and ATA 188 analog telephone adapters. It includes hardware and software feature overviews, network requirements, safety recommendations, and step‑by‑step procedures for initial setup and advanced configuration.
Key sections cover protocol‑specific settings for H.323 and SIP, fax‑passthrough configuration, software upgrade procedures, and troubleshooting tips. The document also contains FCC compliance information, Ringer Equivalence Number (REN) details, and guidance for reducing radio‑frequency interference.
The device complies with the limits for both Class A and Class B digital devices as defined in FCC Part 15.
The total REN of all devices on a single line should not exceed five (5.0).
Turn off the equipment, move it farther from the TV or radio, adjust the antenna, or plug it into a different circuit.