Cabletron Systems Netlink FRX8000, User Manual, Page: 75 / 468

Configuring LPs and LAN Cards 6-15
Clocking
is the clocking mode in which the LP runs:
0
= Master,
1
= Slave
National Use Bit “n”
is the setting of the national use bits in the non-frame alignment signal. National use
bits 1-5 correspond to data bits 4-8 in the non-frame alignment signal. National use
bits are reserved for use within a country. If the signal will cross an international
border, the national use bits should be
Off
.
CRC-4 Disabled?
specifies whether to disable the generation of CRC-4 (polynomial X4 + X + 1).
Enabling CRC-4 enhances error monitoring and provides added protection against
simulation of the frame alignment signal.
International Use Bit 0
is the setting of bit 0, which is transmitted as the most significant bit of the frame
alignment signal when CRC-4 is disabled.
International Use Bit "n" 1
is the setting of bit 1, which is transmitted as the most significant bit of the non-frame
alignment signal when CRC-4 is disabled.
Channel Signalling
is the mode of the CEPT interface.
0
= Common,
1
= Associated.
The multiframe alignment signal is transmitted in time slot 16 when Channel
Signalling has a value of
1
(Associated).
X1,2,3 Bits
specify the settings of spare bits X1, X2, and X3.
A,B,C,D Bits
specify the settings of the signalling bits that are transmitted in time-slot 16 when
Channel Signalling is value
1
.