Specifications

1-7
Cisco 7100 Series VPN Router Installation and Configuration Guide
78-6341-03
Chapter 1 Overview
Cisco 7120 Series Overview
The Cisco 7120-4T1 WAN ports have one enabled (EN) LED and five status LEDs (each of the four
ports has a set of status LEDs). After system initialization, the enabled LED goes on to indicate that all
ports have been enabled for operation. If the initialization fails for any reason, the enabled LED will not
go on. The LEDs are shown in Figure 1-6 and described in Table 1-1.
Figure 1-6 Cisco 7120-4T1 WAN Port LEDs
TD TC
RD
RC
LB
CD
TD TC
RD
RC
LB
CD
EN
TC
TD
RD
RC
LB
CD
5
I
TC
RD
RC
LB
CD
TD
18485
TC TD
RD RC
LB
CD
EN
LEDs
Table 1-1 Cisco 7120-4T1 LEd Descriptions
LED Label Color State Function
EN Green On Indicates ports are ready.
TD Green On DTE—Transmit data out.
DCE—Transmit data in.
TC Green On DTE—Transmit clock in.
DCE—Transmit clock in (TxCE).
RD Green On DTE—Receive data in.
DCE—Receive data out.
RC Green On DTE—Receive clock in.
DCE—Receive clock out.
LB/CD Green On Indicates DTR
1
, DSR
2
, RTS
3
, CTS
4
, or DCD
5
is active.
1. DTR = Data Terminal Ready.
2. DSR = Data Set Ready.
3. RTS = Request To Send.
4. CTS = Clear To Send.
5. DCD = Data Carrier Detect.
Green Flashing Indicates RTS, CTS, or DCD is sending and receiving data in
half-duplex mode.
Yellow On Indicates local loop or internal loop active.