Enterasys TRMIM-10R Manual

9030609-01 September 1992 1
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
TheTRMIM-10RandTRMIM-20Rnowhaveautowrapcapability.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.
Ring-in/Ring-out LEDs
TRMIM-20R
1
X
7
X
SN
7
8
9
10
1
2
3
4
5
6
BYP
16Mb
A
T
C
H
E
D
A
T
A
T
C
H
E
D
A
T
R I
RO
Ring-in / Ring-out
(green non-wrap, red wrap, off disabled)
SN 16Mb BYP
TRMIM-10R
17
5
6
RI
RO
TOKEN RING

ADDENDUM
2 9030609-01 September 1992
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.
Autowrap Switches
Daughter board
Mother board
Front
P
a
nel
1234
ON
OFF
Set Switch to ON for:
SW1 - Ring-In Autowrap Enable
d
SW2 - Ring-Out Autowrap Enab
led

ADDENDUM
9030609-01 September 1992 3
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.
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.
TRMIM-20R
1
X
7
X
SN
7
8
9
10
1
2
3
4
5
6
BYP
16Mb
A
T
C
H
E
D
A
T
A
T
C
H
E
D
A
T
R I
RO
SN 16Mb BYP
TRMIM-10R
17