Cabletron Systems SmartSwitch 6000 User Manual page 124

N2 Retransmit Count
T1 Retransmit Period
T2 Wait Ack Period
T3 Link Alive Period
Logical DCE
Generate Clock
Rcv Clock (TT) from DTE
CSU/DSU Operating Mode
RTS Control
7-6
is X.25 value , the maximum number of times the node will attempt to send an I-
N2
frame after a
Retransmit Period
the probability of an eventual correct transfer between DTE and DCE, but a smaller
value permits faster detection of a permanent error condition.
is the length of time before re-transmission of an I-frame if the previous transmission
is not acknowledged. If the period expires, the FRX/FRM software will reset the timer
and transmit a supervisory frame demanding immediate acknowledgment. Also, the
Maximum Retransmissions
value of allows avoidance of unnecessary retransmission of frames that have
2000 ms
merely been delayed.
is the length of time the node will delay acknowledgment of a received I-frame if there
is no outgoing I-frame to be sent. If during this period the node receives an I-frame for
transmission, the acknowledgment will be sent with it, and the delay timer will be
reset.
is the length of time after which the node will poll its counterpart if there is no data
transfer.
defines the port as (if
Y)
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).
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),
configure
Generate Clock
DTE, configure
Generate Clock
allows the clock to be looped back from the DTE using the TT (Terminal Timing)
signal, which can be helpful on high-speed lines. Generally, if the local interface is
physical DCE and the line speed is above 256 Kbps, this parameter should be set to
(Make sure the remote DTE is configured to provide the terminal timing.)
determines whether the attached modem connection can be normal or limited distance
(LDM), where the distance depends on the wire gauge, number of splice points, and
line speed. For example, 26 gauge wire and a line speed of 64K bps allows a distance
of 15000 feet. Lowering the speed to 56K increases the allowable distance to 18000
feet. If 19 gauge wire is used, the distances can be multiplied by three.
if means that RTS will always be asserted, and if
Constant
CSU/DSU will control RTS.
expiration. A larger value for this parameter increases
(see that entry) counter will be incremented. The default
logical DCE or (if ) DTE. The port must be configured as
N
as , since the physical DCE generates clock. If the port is
Y
as .
N
means that the
External
FRX/FRM 3.3 User Guide, Rev 04
.
Y