Signal performance

Overview

The following specifications apply to the standard networks defined in the following documents:

• Telcordia ^® GR-499-CORE, Issue 3 (DS1/DS3)

• ITU G.703, G.704, G.706, G.736, G.775, M.2100 (E1)

• ITU G.703, G.823 (E3)

DS1/E1 rate

For systems interfacing at the DS1/E1 rate, the number of errored seconds during a 7-hour, one-way loopback test, is less than 10.

DS3/E3 rate

For systems interfacing at the DS3/E3 rate, the number of errored seconds during a 2-hour, one-way loopback test, is less than 29.

BER

The BER is less than 2x10⁻¹⁰ for both the DS1/E1 and DS3/E3 rates. Burst-errored seconds are excluded.

Burst-errored seconds

The frequency of burst-errored seconds, other than those caused by protection switching induced by hard equipment failures, averages less than 4 per day.