HP BER 718 37718A manual Using Feac Codes, HOW to Transmit an Feac code

Selecting Test Features

Using FEAC Codes

Using FEAC Codes

Description The third C-Bit in subframe 1 is used as a FEAC channel, where alarm or status information from the far-end terminal can be sent back to the near-end terminal. The channel is also used to initiate DS3 and DS1 line loopbacks at the far-end terminal from the near-end terminal.

The codes are six digits long and are embedded in a 16 bit code word; the format is 0XXXXXX011111111.

There are two types of code, Loopback and Alarm Status.

Loopback provides a choice of two DS1 messages and two DS3 Messages. The DS1 Messages can be sent in ALL DS1 channels or in a SINGLE channel. The message can be repeated up to 15 times.

Alarm Status provides 13 preset codes and a USER programmable code function. These codes can be transmitted continuously or in bursts.

The new code is transmitted by choosing

BURST or

ON .

HOW TO: Transmit an FEAC code

1 Choose SIGNAL DS3 and PAYLOAD TYPE

MAIN SETTINGS display.

CBIT

on the TRANSMIT

2Choose TRANSMIT TEST FUNCTION and ALARM TYPE DS3 FEAC . When a FEAC code is not being transmitted, an all ones pattern is transmitted.

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