Cabletron Systems Netlink FRX8000, Руководство пользователя

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8-6 FRX8000 3. 0 User G uide, Rev 02
Blocked Port Flag
causes the port to be enabled (
N
) or disabled (
Y
) at node IPL. The port will remain in
that state until this parameter is changed (and sent to the node) or an on-line enable/
disable is performed. (See "
Disabling and Enabling Ports" on page 18-1.)
Line Speed Code
specifies the data transmission rate in bits per second, and the clock speed when the
port is a physical DCE. If this port is not configured to generate clock, specify the line
speed that corresponds (as closely as possible) to the configuration of the device con-
nected to the port. Line speed codes are as follows. (Some speeds have two corre-
sponding codes because they are defined in different parts of the software. Either code
can be specified.)
3
= 75
4
= 150
5
= 300
6
= 600
7
= 1200
8
= 2400
9
= 4800
10
= 9600
11
= 19.2K
12
= 48K
13
= 56K
14
= 64K
15
= 72K
16
= 112K
17
= 128K
18
= 224K
19
= 256K
20
= 14.4K
21
= 24K
22
= 28.8K
23
= 38.4K
24
= 56K
25
= 112K
26
= 168K
27
= 224K
28
= 280K
29
= 336K
30
= 392K
31
= 448K
32
= 504K
33
= 560K
34
= 616K
35
= 672K
36
= 728K
37
= 784K
38
= 840K
39
= 896K
40
= 952K
41
= 1.008M
42
= 1.064M
43
= 1.12M
44
= 1.176M
45
= 1.232M
46
= 1.288M
47
= 1.344M
48
= 1.4M
49
= 1.456M
50
= 1.512M
51
= 1.568M
52
= 1.624M
53
= 1.68M
54
= 64K
55
= 128K
56
= 192K
57
= 256K
58
= 320K
59
= 384K
60
= 448K
61
= 512K
62
= 576K
63
= 640K
64
= 704K
65
= 768K
66
= 832K
67
= 896K
68
= 960K
69
= 1.024M
70
= 1.088M
71
= 1.152M
72
= 1.216M
73
= 1.28M
74
= 1.344M
75
= 1.408M
76
= 1.472M
77
= 1.536M
78
= 1.6M
79
= 1.664M
80
= 1.792M
81
= 1.728M
82
= 1.856M
83
= 1.92M
84
= 1.984M
85
= 2.048M
The maximum for an RS-232 interface on an N7400 or 7500 is 19.2K. The
maximum for an RS-232 interface on an FRX8000 is 64K if the port is
directly connected to the user device via the 5-foot Cabletron RS-232
cable. If modems or longer cabling are used, the recommended maximum
speed is 19.2K. (The EIA RS-232 standard applies to line speeds of 19.2K
and lower.)
Maximum Frame Size
is the maximum frame size that will be allowed to pass through the port.
Logical DCE
Selecting
N
defines the port as logical DTE. The other end of the connection must be
the opposite of this port. Logical DCE/DTE is independent of physical—either can be
either. For frame relay ports, this parameter specifies the LMI role: network or user.
Generate Clock
If this port is a physical DCE (determined by the port’s I/O interface), specify
Y
, since
DCE generates clock. If the port is DTE, specify
N
.
Rcv Clock (TT) from DTE
allows the clock to be looped back from the DTE using the TT (Terminal Timing)
signal, which can be helpful on high-speed ports.