Cabletron Systems Netlink FRX8000, User Manual

Page: 183 / 468

Configuring BSC 12-7
Block Check
used only when
EBCDIC
is
N
, sets the redundancy check parameter:
0
= crc16 (crc = Cyclic Redundancy Check)
1
= even lrc (lrc = Logical Redundancy Check)
2
= odd lrc
Data Mode
used only when
EBCDIC
is
N
, sets the parity parameter:
0
= 7 bit odd
1
= 7 bit even
2
= 8 bit no parity
Interactive Parameters
Call Info in Call Req
specifies whether the user will have the option of including call information in a Call
Request packet. Currently, this must be configured as
Y
.
Clear VC on Last Dev. Down
if
Y
, causes the virtual circuit to be cleared when no terminals are using it.
Transparent Text Supported
causes all characters transmitted, including control character sequences, to be treated
as data. This is useful for transmitting binary data, machine language computer pro-
grams, etc., without special coding. Currently, this parameter must be configured as
Y
.
Data-link control character sequences transmitted during transparent mode must be
preceded by character 1/0 (DLE) in order to be recognized as control characters.
End-to-End Acknowledgment
allows management of acknowledgments end to end across the network, rather than
locally at each end. Local acknowledgment provides better performance, while end-
to-end acknowledgment provides greater reliability. Currently, this parameter must be
configured as
N
.
Full Duplex
specifies full-duplex transmission (both directions at once). Currently, this must be
configured as
Y
.
Slow Poll Retry Count
applicable only to connections configured for multidrop, specifies how many times
the control unit (CU) will be polled (if it is not responding) before it is put on the “slow
poll” list. CUs on the slow poll list will be polled with a frequency determined by the
parameter
Slow Poll Retry Frequency
.
Slow Poll Retry Frequency
specifies the number of times active CUs will be polled between pollings of the CUs
on the slow poll list.
Error Retransmit Count
specifies the number of times the FRX8000 will re-send a block of data after the
receiving device has detected an error in that block.