Cabletron Systems 1800 - Manual (Page 84)

7-16 SmartSwitch 1800 4. 0 User G uide, Rev 01
Blocked Port Flag
will cause the port to be enabled ( N ) or disabled ( Y ) at node IPL. The port will remain
in that state until this parameter is changed or an on-line enable ( [B], [B], [C] from the
Main Menu) or disable ( [B], [B], [A] from the Main Menu) is performed.
If set to Y , no backup DLCIs on this port will be used (even if the port is enabled via
on-line port enable).
Line Speed
is the data transmission rate in bits per second, and the clock speed 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 a CSU/DSU port will toggle between the two valid values
of
56K bps and 64K Clear Channel .
Selecting this parameter for any other physical interface type will display a list of
ranges. Press the letter corresponding to a range to display the valid speeds within that
range. All possible speeds are:
75 150 300 600 1200
2400 4800 9600 14.4K 19.2K
24K 28.8K 38.4K 48K 56K
64K 72K 112K 128K 168K
192K 224K 256K 280K 320K
336K 384K 392K 448K 504K
512K 560K 576K 616K 640K
672K 704K 728K 768K 784K
832K 840K 896K 952K 960K
1.008M 1.024M 1.064M 1.088M 1.12M
1.152M 1.176M 1.216M 1.232M 1.28M
1.288M 1.344M 1.4M 1.408M 1.456M
1.472M 1.512M 1.536M 1.568M 1.6M
1.624M 1.664M 1.668M 1.728M 1.792M
1.856M 1.92M 1.984M 2.048M
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.)
Maximum Bytes per Frame
specifies the maximum size of any I-frame (Information frame) that can be transmitted
or received on the port.
Logical DCE
defines the port as (if Y ) logical DCE or (if N ) DTE. The port must be configured as
the opposite of the device at the other end of the connection.
Logical and physical DCE/DTE are independent of each other (e.g., a port can be a
physical DCE and logical DTE).
Generate Clock
specifies whether the port will generate the clock necessary to synchronize traffic over
the link. If the port is a physical DCE (determined by the port's I/O cable interface),
set this parameter to
Y , since the physical DCE generates clock. If the port is DTE, set
the parameter to N .