
Total Access 850 System Manual Section 2 Engineering Guidelines
64203376L1-1B © 2004 ADTRAN, Inc. 31
Faceplate Bantam Jack
The faceplate bantam jack provides a means to monitor the network T1 connected to the rear of the
Total Access 850 chassis. The jacks accept standard 310-type bantam plugs. Figure 5 display the bantam
jack monitoring points.
Figure 5. 3rd GEN RCU Bantam Jack Test Diagram
Table 6. 3rd GEN T1 RCU Faceplate LEDs
For these LEDs... This color light... Indicates that...
T1 GREEN the network T1 interface is operational.
RED the network T1 is in Red Alarm (meaning the T1 is down,
not connected, or framing is improperly configured).
AMBER the network T1 is in test mode (loopback).
ETH GREEN there is a valid 10 Mbps Ethernet link.
AMBER there is a valid 100 Mbps Ethernet link.
RED there is no active Ethernet link.
Clock and Data
Recovery
MON IN
Test Jack
T1
RX
PAIR
Line Format
Decoder
To
Backplan
Receiver Circuitry
Transmitter Circuitry
MON OUT
Test Jack
Local
Loopback
Point
T1
TX
PAIR
From
Backplan
Line
Loopback
Point
Payload/CSU
Loopback
Point
Equalizer
Line Format
Encoder
DJAT
T1
R1
T
R
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