Telect MIX 56 user manual 4-47

MIX 56 User Manual 4 Software Operation

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:

	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

•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

122188-10 A0 Telect, Inc. 4-47