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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 4 BNI (Trunk) Cards
T3 and E3 Line Modules (LM-3T3 and LM-3E3)
T3 and E3 Line Modules (LM-3T3 and LM-3E3)
The Line Modules for the BNI-T3 and BNI-E3 front cards are back cards used to provide a physical
interface to the transmission facility. The LM-3T3 is used with the BNI-T3. The LM-3E3 with the
BNI-3E3.
The Line Module connects to the BNI through the StrataBus midplane. You can make two adjacent
cards of the same type redundant by using a Y-cable at the port connectors. All three ports on a card
must be configured the same.
Refer to Figure 4-4, Figure 4-5, and Table 4-3 which describe the faceplate connectors of the LM-3T3
and LM-3E3. There are no controls or indicators.
The LM-3T3 and LM-3E3 provides these features:
•
BNC connectors for 75-ohm unbalanced signal connections to the transmit and receive of each of
the three ports.
•
Transformer isolation from the trunk lines.
•
Metallic relays for line loopback when in standby mode.
A final node loopback is at the end of the LM-3T3 or LM-3E3 card. This is a metallic loopback path
that uses a relay contact closure. It is a near-end loopback path only; the signal is looped at the final
output stage back to circuits in the node receive side. It is operated only when the corresponding front
card is in standby.
Table 4-2
BNI Front Panel Card Failure Indications
act
stby
fail
Failure Description
on
off
on
Non-fatal error detected; the card is still active.
off
on
on
Non-fatal error detected; the card is in standby mode.
off
blinking
on
Fatal error detected; the card is in a reboot mode.
on
on
on
The card failed boot load and operation is halted.
Table 4-3
LM-3T3 and LM-3E3 Connectors
No
Connector
Function
1
PORT 1 RX - TX
BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 1.
2
PORT 2 RX - TX
BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 2.
3
PORT 3 RX - TX
BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 3.
Содержание BPX 8600 Series
Страница 43: ...P A R T 1 The BPX Switch ...
Страница 44: ......
Страница 151: ...P A R T 2 Installation ...
Страница 152: ......
Страница 261: ...P A R T 3 Initial Configuration and Network Management ...
Страница 262: ......
Страница 291: ...P A R T 4 Configuring Connections ...
Страница 292: ......
Страница 481: ...P A R T 5 Troubleshooting and Maintenance ...
Страница 482: ......
Страница 531: ...P A R T 6 BPX Specifications ...
Страница 532: ......
Страница 563: ...P A R T 7 Appendices ...
Страница 564: ......
Страница 624: ...Glossary 24 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...
Страница 630: ...Index 6 Cisco BPX 8600 Series Installation and Configuration Release 9 3 0 Part Number 78 10674 01 Rev D0 July 2001 ...