User guide

6-10 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
6
The individual channel Loop Payload loops a selected ÒfractionÓ of the T1 signal
toward the network. In this mode, the selected data is corrected for BPV, CRC and
framing errors, and the FDL is regenerated before the data is looped back to the
network.
Receive and transmit clocks and data are suppressed toward the V.35 port on the DTE
channels. Payload service to ports not in loopback is not affected.
The DTE/NET Test
The Loop DTE/NET test combines the Loop DTE on full bandwidth, and the Loop
NET tests.
Running Multiple Payload Tests
To run multiple loopbacks the device must have more than two DTE ports. You can run
multiple Loop Payload tests simultaneously from Menu-9 or SNMP but not from the
front panel interface. You can run multiple fractional loop payload tests by sending
fractional loop codes from the remote DSU/CSU via SNMP, DLMS, a terminal, or from
the front panel interface.
NOTE: To run multiple fractional loop payload tests, you must Þrst terminate any
current tests (other than a fractional payload test).