Cabletron Systems SmartSwitch 6000 User Manual page 186

Blocked Port Flag
Line Speed
Retransmission Period
Maximum Retransmissions
Maximum Bytes per Frame
9-12
V.35, RS-449, and X.21
LIC. Also, RS-530 and X.21 are available through special order only.)
will cause the port to be enabled (
in that state until this parameter is changed or an on-line enable (
Main Menu) or disable (
is the data transmission rate in bits per second, and the clock speed on a serial port
when the port is a physical DCE (i.e., the attached I/O cable is DCE). If this port is a
physical DTE, specify the line speed that matches (as closely as possible) that of the
device connected directly to the port.
Selecting this parameter for an FRX4000
values of and
56K bps 64K Clear Channel
except FRX4000 will display a list of ranges. Press the letter corresponding to a
DSU
range to display the valid speeds within that range. All possible speeds are:
75 150
2400 4800
24K 28.8K
64K 72K
192K 224K
336K 384K
512K 560K
672K 704K
832K 840K
1.008M 1.024M
1.152M 1.176M
1.288M 1.344M
1.472M 1.512M
1.624M 1.664M
1.856M 1.92M
If an RS-232 DCE port is directly connected to the DTE via the
standard Cabletron cable, the maximum supported speed is 64K. If
longer cabling is used, the maximum speed is 19.2K. (The EIA
standard for RS-232 addresses speeds up to 19.2 Kbps.)
is the length of time before the node will transmit an I-frame if the previous trans-
mission is not acknowledged. If the period expires, the timer will be reset and a super-
visory frame will be transmitted demanding immediate acknowledgement. The
Maximum Retransmissions
The default value of
2000 ms
frames that have merely been delayed.
is the maximum number of times the node will attempt to send an I-frame after a
expiration. A larger value for this parameter increases the prob-
Retransmission Period
ability of an eventual successful transmission, but a smaller value permits faster
detection of a permanent error condition.
is the maximum frame size that will be transmitted on the port.
. (RS-449, RS-530, and X.21 i
) or disabled (
N
from the Main Menu) is performed.
[B], [B], [A]
port will toggle between the two valid
DSU
. Selecting this parameter for any port type
300
9600
38.4K
112K
256K
392K
576K
728K
896K
1.064M
1.216M
1.4M
1.536M
1.668M
1.984M
(see that entry) counter will also be incremented.
allows avoidance of unnecessary retransmission of
nterfaces require an RS-422
) at node IPL. The port will remain
Y
[B], [B], [C]
600
14.4K
48K
128K
280K
448K
616K
768K
952K
1.088M
1.232M
1.408M
1.568M
1.728M
2.048M
FRX/FRM 3.3 User Guide, Rev 04
from the
1200
19.2K
56K
168K
320K
504K
640K
784K
960K
1.12M
1.28M
1.456M
1.6M
1.792M