ADDENDUM SHEET
Two features have been added to the TRMIM-10R and TRMIM-20R.
The units now have autowrap capability and a BYP LED on the front
panel. This addendum describes these changes.
AUTOWRAP CAPABILITY
The TRMIM-10R and TRMIM-20R now have autowrap capability. This
addendum supplements Chapter 3 (Installation) of the manual. All
references to wrap jumpers are no long applicable.
The RI/RO LEDs on the front panel are now two color. They display
green when the port is not wrapped and display red when the port is
wrapped. If the light is off, the port has been disabled by network
management.
TRMIM-10R
SN
RI
RO
16Mb
5
6
17
BYP
TRMIM-20R
SN
10
R I
RO
7
X
Ring-in / Ring-out
(green non-wrap, red wrap, off disabled)
7
A
T
8
T
A
9
C
H
E
D
1
A
T
2
T
A
3
C
4
H
E
5
D
6
1
X
BYP
16Mb
TOKEN RING
9030609-01 September 1992 1
Ring-in/Ring-out LEDs
ADDENDUM
Daughter board
Mother board
Front
P
nel
d
led
Switches have been added to the board as shown in the figure below.
The switches are configured as follows:
Switch 1
ON To enable autowrap at the Ring-In port (i.e.,
Ring-In is connected to a device capable of
autowrap operation)
OFF To disable autowrap at the Ring-In port (i.e., the
upstream device is incapable of autowrap
operation)
Switch 2
ON To enable autowrap at the Ring-Out port (i.e.,
Ring-Out is connected to a device capable of
autowrap operation)
OFF To disable autowrap at the Ring-Out
port (i.e.,
the downstream device is incapable of autowrap
operation)
Modules are shipped with switches 1 and 2 turned on. Switches 3 and
4 are not used.
NOTE:
Autowrap must be disabled when the respective ring port is
attached to a device that is not capable of autowrap (i.e., TRC-800). If
Autowrap is enabled for these connections, the associated repeater ring
port will remain in the wrapped state.
a
Set Switch to ON for:
SW1 - Ring-In Autowrap Enable
SW2 - Ring-Out Autowrap Enab
Autowrap Switches
1234
ON
OFF
2 9030609-01 September 1992
ADDENDUM
BYP LED
The TRMIM-10R and TRMIM-20R now have a BYP LED on the front
panel as shown below. All references in the manual to the ERR LED
are no long applicable.
The BYP LED indicates the module is in Bypass mode. When lit, this
indicates the module has been bypassed through system management.
TRMIM-10R
SN
16Mb
BYP
TRMIM-20R
SN
16Mb
7
A
T
8
T
A
9
17
C
10
H
E
R I
D
RO
7
X
BYP
1
A
T
2
T
A
3
C
4
H
E
5
D
6
1
X
BYP (Bypass) LED
The BYP LED may also be lit when a ring is first powered up and has
no traffic. If the module is not bypassed by system management, the
LED will be extinguished when the first packet is detected.
9030609-01 September 1992 3
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