Terminal Equipment Simulator 5620

Application

The 5620 is designed to verify and measure the signals originated from a CO (Central Office) line card, analogue PBX line, VoIP terminal adapter with FXS port, or any device utilizing a SLIC (Subscriber Line Integrated Circuit).
Using a single programmable analogue port, it simulates the characteristics of TE (Terminal Equipment) or CPE (Customer Premise Equipment) devices. This includes the capability of presenting various DC resistance loads, AC terminations, and ringing loads.

It verify Caller ID signals generated from CO's, PBX's, and line simulation equipment.
Measures general telephony signals such as DTMF, ringing, line flash duration, and line voltage.
Tests SLIC characteristics and monitor telephone line signals.

Description

The 5620 consists of two distinct functional elements. The first provides all the measurement capabilities of the instrument, while the second one provides the ability to change physical line characteristics and generate signals. It sense the differential line voltage, common mode voltage, and loop current flowing through the analogue two wire port. It performs various measurements on AC signals such as RMS level, frequency, and THD+N (Total Harmonic Distortion + Noise), with or without the use of programmable filters. Additionally it detects common telephony signals such as ringing, DTMF dialling, pulse dialling, V.23 or Bell202 FSK (for Caller ID applications), CAS/DTAS tones, and metering pulses. Sweep measurements are also available for graphing frequency response and DC line resistance characteristics.

The 5620 has the ability to adjust its line characteristics and generate AC signals. It provides various DC resistance settings as well as AC termination settings. The DC resistance includes a programmable range of 50 to 1000 ohms, along with a zero ohm setting. AC terminations are programmable from 200 ohms to 1000 ohms, or one of three complex impedances can be selected. Additionally, ringer loads of 1 to 6 REN may be applied to the telephone line to simulate different ringing conditions.

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