Cabletron Systems MMAC-Plus 9F116-01, Руководство пользователя, Страница: 122 / 420

7-4 FRX/FRM 3. 3 User G uide, Rev 04
1
1–7
if Modulo 8,
1–127
if Modulo 128.
2 This parameter is relevant only if
Physical Port Interface
is something other than
RS-
232 and Generate Cl ock is Y .
3 If SDLC-LLC2 conversion is configured over the port, Fast Select Acceptance must be
Y
. Also, if the X.25 link is to an X.25 network, the network must support Fast Select as
well as call user data greater than 32 bytes.
Port Type
defines the protocol the port will support. Selecting this parameter will display a list
of valid protocols. An FRX4000 port can be configured as any WAN protocol loaded
in the device. An FRX6000 or FRM port can be configured as any WAN protocol con-
figured on this port's RLP. (Protocol configuration is described in Chapter 4.)
Physical Port Interface
must be configured as follows. For reference, port locations are shown on page 5-1
(FRX4000), page 5-2 (FRX6000), and page 5-3 (FRM).
●
FRX4000 port 0 is always
RS-232
.
●
FRX4000 port 1 is
RS-232
or
DSU
, depending on whether the optional CSU/
DSU card is installed.
●
FRX4000 ports 2 and 3 are determined by the attached cables:
RS-232, V.35, RS-
449
, or
X.21
.
●
FRX4000 ports 4–7 are determined by the expansion Line Interface Card (LIC)
and attached I/O cables. Line Processor Configuration identifies the LIC, and
only the valid interfaces will be displayed on the Port screen, among:
RS-232
,
V.35
,
RS-449
, and
X.21
. (RS-449 and X.21 interfaces require an RS-422 LIC,
which is available by special order.)
●
FRX6000 ports 0–7 on each RLP are determined by the Line Interface Card(s)
and attached I/O cables. Line Processor Configuration identifies the LIC, and
only the valid interfaces will be displayed on the Port screen, among:
RS-232,
Mask Link Alar ms Y/N N
Maximum Packet Size 128–4096 1024
Defaul t Window Size 1–7 2
Defaul t Packet Si ze 16–4096 128
Maximum Window Size 1–7 7
Maximum Throughput Class
see explanation none
Defaul t Calling Address 0–15 characters none
T20 Restart Timer (sec) 1–600 60
T21 Incoming Call Timer (sec) 1–600 180
T22 Reset Timer
(sec)
1–600 60
T23 Clear Tim er (sec) 1–600 60
DTE Restart Retry Count 0–99 0
DTE Reset Retry Count 0–99 0
DTE Clear Retr y Count 0–99 0
Table 7-1 X.25 Port Parameters
Parameter Valid Values Default Value
(continued)