T3 And E3 Line Modules (Lm-3T3 And Lm-3E3); Table 4-2 Bni Front Panel Card Failure Indications; Table 4-3 Lm-3T3 And Lm-3E3 Connectors - Cisco BPX-BXM-155-8DX Installation And Configuration Manual

T3 and E3 Line Modules (LM-3T3 and LM-3E3)

Table 4-2
act
on
off
off
on
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:
•
•
•
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 4-3
No
1
2
3
Cisco BPX 8600 Series Installation and Configuration
4-8
BNI Front Panel Card Failure Indications
stby fail
off on
on on
blinking on
on on
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.
LM-3T3 and LM-3E3 Connectors
Connector Function
PORT 1 RX - TX BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 1.
PORT 2 RX - TX BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 2.
PORT 3 RX - TX BNC connectors for the transmit and receive T3/E3 signal to/from
ATM trunk 3.
Failure Description
Non-fatal error detected; the card is still active.
Non-fatal error detected; the card is in standby mode.
Fatal error detected; the card is in a reboot mode.
The card failed boot load and operation is halted.
Release 9.3.0, Part Number 78-10674-01 Rev. D0, July 2001
Chapter 4 BNI (Trunk) Cards