Verilink 2000 (34-00182) Product Manual - Manual (Page 50)

4-16 T ERMINAL O PERATION
AIS. Transmit unframed all ones toward the NET.
ONES. Transmit framed all ones toward the NET.
LOOP. Activate a payload loopback on the NET interface.
The symbol represents a line fault.
NET->DTE CRC
Determines whether received CRC data from the network is passed to the DTE or
if a new CRC is generated. The choices are PASS and REGEN.
NET LBO
Sets the line build out for the network interface. The choices are 0 dB, -7.5
dB, -15 dB, and -22.5 dB.
PRM Generation
Turns the T1.403 Performance Report Message, which is sent once a second, on or
off. The choices are ENABLED and DISABLED.
Zero Suppression
This field determines whether ones-density insertion is activated after 15 zeros
(rather than 175 zeros). The choices are ENABLED and DISABLED.
If the QRSS pattern is detected on the DTE receiver, the NET transmitter zero suppression
is DISABLED regardless of this option setting.
DTE Framing
Selects the type of framing for the equipment side of the CSU. The unit permits
framing conversion from the DTE to the network and from the network to the DTE
Framing, CRC, FDL
Tx
Rx
Rx
Tx
DTE LOF, AIS to NET
DTE
Interface
AIS
NET
Interface
Framing, CRC, FDL
Tx
Rx
Rx
Tx
DTE LOF, Framed Ones to NET
DTE
Interface
F1s
NET
Interface
Framing, CRC, FDL
Tx
Rx
Rx
Tx
DTE LOF, PLB on NET
DTE
Interface
F1s
NET
Interface
Figure 4-13 Network Keep Alive Descriptions