Cabletron Systems MicroMMAC 24T MICROMMAC- - Manual (Page 47)

INSTALLATION
3-12
2. The associated Port Status LED lights green when the station boots up.
If the LED doesn’t light, perform the following steps:
a. Check that the device at the other end of the twisted pair segment
has power, and that the network interface driver is initialized.
b. Verify the RJ45 connector pinouts on the twisted pair segment.
c. Check that the twisted pair connection meets the dB loss limits and
cable specifications outlined in Chapter 2.
d. Check Local Management to ensure that the port is enabled.
e. If a link still can not be established, contact Cabletron Systems
Technical Support.
3.9 INSTALLING TPIM MODULES
TPIMs provide specialized RI/RO ports for trunk connections. Each TPIM
supports a different medium (cable type). Different TPIMs may be
operated together: for example, a TPIM-T1 can provide a Ring-In port
while a TPIM-T4 provides a Ring-Out port.
The following sub-sections explain how to set the Phantom and RI/RO
Switches, how to install a TPIM into a MicroMMAC-T, and how to attach
network segments through the TPIM.
Prior to connecting trunk cabling to the TPIMs, check the connectors for
proper pinouts. Table 3-1 provides a cross-reference of pinouts for TPIMs
used for Ring-In or Ring-Out applications.
Table 3-1. Pinout Cross-Reference for TPIMs
Signal
TPIM-T2/T4
(RJ45)
Ring-In
TPIM-T2/T4
(RJ45)
Ring-Out
TPIM-T1
(DB9)
Ring-In
TPIM-T1
(DB9)
Ring-Out
TX+ 6 4 9 1
TX- 3 5 5 6