Cabletron Systems SmartSwitch 6000 User Manual page 123

Blocked Port Flag
Line Speed
Modulo
Maximum LAPB Window Size
Configuring X.25
V.35, RS-449, RS-530
RS-422 LIC.)
FRM ports 0–7 are determined by the Line Interface Cards and attached I/O
cables. Line Processor Configuration identifies the LICs, and only the valid
interfaces will be displayed on the Port screen, among:
, and . (RS-449, RS-530, and X.21 i
530 X.21
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 DSU port will toggle between the two valid
values of and
56K bps
except FRX4000
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 number of values used in X.25 level 2 sequenced packets. The actual frame num-
bering is for modulo 8 and
0–7
is X.25 value , the maximum number of sequentially numbered I-frames that can be
K
waiting for acknowledgment. If this number is exceeded, no more frames will be
transmitted until an acknowledgment is received. A larger value allows faster
throughput.
, and X.21 . (RS-449, RS-530, and X.21 i
) or disabled (
N
from the Main Menu) is performed.
[B], [B], [A]
. Selecting this parameter for any port type
64K Clear Channel
will display a list of ranges. Press the letter corresponding to a
300
9600
38.4K
112K
256K
392K
576K
728K
896K
1.064M
1.216M
1.4M
1.536M
1.668M
1.984M
for modulo 128.
0–127
nterfaces require an
RS-232, V.35, RS-449, RS-
nterfaces require an RS-422 LIC. Also,
) 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
from the
1200
19.2K
56K
168K
320K
504K
640K
784K
960K
1.12M
1.28M
1.456M
1.6M
1.792M
7-5