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MIX 56 User Manual 4 Software Operation
122188-10 A0 Telect, Inc.
4-47
The following remote loopbacks can be requested from the Loopbacks
screen:
Low Speed “Remote Tx LpUp”: Transmits a DS1 Loop Up code for 6
seconds. The MIX 56 uses CSU loop codes.
Low Speed “Remote Tx LpDn”: Transmits a DS1 Loop Down code for 6
seconds. The MIX 56 uses CSU loop codes.
High Speed “Remote DS1 Ch xx in DS3”: Requests a loopback of the in-
dividual DS1 signal for Channel xx of the MUXed DS3 signal at the other
end of the DS3 link.
High Speed “Remote All DS1’s in DS3”: Requests a loopback of all DS1
signals of the MUXed DS3 signal at the other end of the DS3 link. This re-
mote loopback request is only available if the DS3 mode is set for C-Bit.
High Speed “Remote DS3 (Line)”: Requests a loopback of the entire
DS3 signal at the other end of the DS3 link. This remote loopback request
is only available if the DS3 mode is set for C-Bit.
NOTES
• The MIX 56 will respond to receiving low-speed and high-speed remote
loopback requests if the “Loopback Permission” is set to Yes on the
System Settings screen.
• Low-Speed Loop-Up and Loop-Down codes vary depending on the in-
terface setting and whether they are transmitted or received. The inter-
face setting for the individual DS1 line is set from the Low Speed Con-
figuration Screen.
The Loop-Up and Loop-Down codes and the number of bits in each
code are CSU loop codes, as defined below:
• The low-speed loopback settings of “Remote Tx LpDn” and “Remote
Tx LpUp” causes the MIX 56 to transmit the appropriate loop-up or
loop-down code for 6 seconds and then terminate the transmission.
• The MIX 56 will also respond when receiving the appropriate loop-up
or loop-down code if the “Loopback Permission” setting of the System
NI Interface CI Interface
Code Bits Code Bits
Rx Loop Up 03 5 01 5
Rx Loop Down 07 5 01 3
Tx Loop Up 01 5 03 5
Tx Loop Down 01 3 07 5