Cabletron Systems TRXI-24 - Manual (Page 23)

REQUIREMENTS/SPECIFICATIONS
Page 2-12
2.4 TPIM SPECIFICATIONS
TPIMs provide Ring In and Ring Out (RI/RO) connections. They let
you extend your network using a variety of media. Each TPIM has an
embedded repeater that retimes all data.
The LNK (Link) LED on each TPIM provides the following
information:
• Green - RI or RO active
• Red (TPIM-T1/T2/T4 only) - No Link (Autowrapped)
• Off - No Link (Wrapped or Disabled)
The following sections describe each TPIM.
TPIM-T1
The TPIM-T1 is a female DB9 connector that supports STP cabling.
Figure 2-3 shows TPIM-T1 pinouts for Ring Out and Ring In
applications.
Figure 2-3. TPIM-T1 Pinouts
RING OUT
1. Transmit +
2. Ground
3. +5V at 250 mA
4. Ground
5. Receive -
6. Transmit -
7. Ground
8. Ground
9. Receive +
TPIM-T1
LNK
5 4 3 2 1
9 8 7 6
RING IN
1. Receive +
2. Ground
3. +5V at 250 mA
4. Ground
5. Transmit -
6. Receive -
7. Ground
8. Ground
9. Transmit +