6-14 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
6
The Send All Zeroes Test
This pattern is used to check the correct operation of the B8ZS (T1) line coding. This
code is meant to allow a pattern with many 0 bits to go through the line transparently.
The Send 1:4 (or alternate) Test
The 1:4 code is the standard loop up remote code. It is typically used when the loop
up remote test fails to put the remote system into loopback. You can determine if the
failure is an intermittent or a hard failure by continuously sending the 1:4 code, and
monitoring the network status to see if the pattern is being received.
The selections are available on the full bandwidth and on the data ports
The full bandwidth code puts the remote system into full network loopback. When
used on a data port, the code puts the corresponding remote port into Loop Payload.
The Send 1:2 Test
The 1:2 code is the standard loop down remote code. Use it when the Loop Down
Remote test fails to terminate the remote loopback.
You can determine if the failure is an intermittent or hard failure by continuously
sending the 1:2 and monitoring the network status to see if the pattern is being
received.
The selections are available on the full bandwidth and on Data Port 1. The full
bandwidth code takes the remote system out of full network loopback. When used on
Data Port 1, the code takes the corresponding remote port out of Loop Payload.
NOTE: If the Loop Up Remote test fails to place the remote system into loopback,
check that the Loop Code and Network Framing parameters are the same at each end
of the link.
Comments to this Manuals