
operate.
G.SHDSL CD
Green
On when the G.SHDSL device is
physically connected. Blinks when the
connection has a problem.
G.SHDSL
RXD
Green
Blinks when a G.SHDSL port receives
data.
G.SHDSL
TXD
Green
Blinks when a G.SHDSL port sends
data.
ETHERNET 1,
2, 3, 4
Green
On when an Ethernet device is
connected Blinks when the connection
has a problem.
ETHERNET
RXD
Green
Blinks when an Ethernet port receives a
packet.
ETHERNET
TXD
Green
Blinks when an Ethernet port sends a
packet.
Cisco 1401
ATM−25 Cable
The green RJ−45−to−RJ−45 ATM−25 cable connects the Cisco 1401 through a DSL modem to the ADSL
line. This cable must be Category 3, 4, or 5 unshielded twisted−pair (UTP).
ATM−25 Cable Pinouts
Pin
Signal
1
RD+
2
RD−
7
TD+
8
TD−
Note: Pins 3, 4, 5, and 6 are not used.
If you want to connect the ATM−25 port to the ATM port on another router, supply an RJ−45−to−RJ−45
crossover cable.
ATM Loopback Plug
An ATM loopback plug is used when a loopback test on the Cisco 1401 is performed.
ATM Loopback Plug Pinouts
Pin
Signal Pin Signal
1
RD + < −−− > 7 TD +
Cisco − DSL Modem/Router Interface Pinouts and Status LED Descriptions
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