HP OMNIBER 718 HP 37718A - Manual (Page 61)

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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 or .
HOW TO: Transmit an FEAC code
1 Choose SIGNAL and PAYLOAD TYPE on the
display.
2 Choose and ALARM TYPE .
When a FEAC code is not being transmitted, an all ones pattern is
transmitted.
BURST ON
DS3 CBIT TRANSMIT
MAIN SETTINGS
TRANSMIT TEST FUNCTION DS3 FEAC