Cabletron Systems MMAC-Plus 9F116-01, Руководство пользователя, Страница: 181 / 420

Configuring BSC 9-7
Call Info in Call Request Packet
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 Device 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 acknowledgement provides better performance, while end-
to-end acknowledgement 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
.
Multidrop
specifies whether transmisison will be multidrop (several stations between end points)
or point-to-point.
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.
# of Beginning Sync Char
specifies the number of synchronization characters that will be added to the beginning
of each frame.
# of Trailing Pad Characters
specifies the number of padding characters that will be appended to each frame, to
ensure that the last significant character is sent before the data transmitter switches off.
Poll Interval Timer
specifies the time between passes through the polling list.
No Response Timer
is activated after transmission of a general poll or a data frame. On expiry, a NAK–
EOT–General Poll sequence is transmitted, and the
No Response Retry Count
is incre-