Cisco CISCO776 Installation Guide - Page 25

Cisco 761, Cisco 771 and Cisco 772 routers do not have PH1 and PH2 LEDs.

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Page 25 highlights

Note Cisco 761, Cisco 765, Cisco 771 and Cisco 775 routers do not have NT1 LEDs. Cisco 761, Cisco 762, Cisco 771 and Cisco 772 routers do not have PH1 and PH2 LEDs. Table 1-1 lists the LEDs and their functions. Table 1-1 Front-Panel LED Functions LED Function RD (Cisco 760 series) Indicates the router operating status. On when power is supplied to the RDY (Cisco 770 router, the router passes the self-test, and is operating normally. series) NT1 (Cisco 762, Cisco 766, Cisco 772, and Cisco 776 only) • On when the internal NT1 and the ISDN switch are synchronized. • Blinking (5 blinks per second) indicates that the internal NT1 is attempting to synchronize with the telephone switch. • Blinking (1 blink per second) indicates that the internal NT1 is attempting to synchronize with the ISDN terminal devices. LINE On when the NT1 S interface and the ISDN terminal device(s) are synchronized. Also indicates framing between the router and the ISDN switch. LAN On when packets have been sent to or received from the Ethernet within the last minute. RXD Blinks when packets are received from the LAN. TXD Blinks when packets are sent to the LAN. LK1 (Cisco 770 only) On when the first LAN link of the unmanaged hub is connected. Blinks (once every 1.5 seconds) when there is a problem with the connection. LK2 (Cisco 770 only) On when there is a connection on the second LAN link of the unmanaged hub is connected. Blinks (once every 1.5 seconds) when there is a problem with the connection. LK3 (Cisco 770 only) On when there is a connection on the third LAN link of the unmanaged hub is connected. Blinks (once every 1.5 seconds) when there is a problem with the connection. Overview 1-11

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Overview
1-11
Note
Cisco 761, Cisco 765, Cisco 771 and Cisco 775 routers do not have NT1 LEDs.
Cisco 761, Cisco 762, Cisco 771 and Cisco 772 routers do not have PH1 and PH2 LEDs.
Table 1-1 lists the LEDs and their functions.
Table 1-1
Front-Panel LED Functions
LED
Function
RD (Cisco 760 series)
RDY (Cisco 770
series)
Indicates the router operating status. On when power is supplied to the
router, the router passes the self-test, and is operating normally.
NT1
(Cisco 762,
Cisco 766, Cisco 772,
and Cisco 776 only)
•
On when the internal NT1 and the ISDN switch are synchronized.
•
Blinking (5 blinks per second) indicates that the internal NT1 is
attempting to synchronize with the telephone switch.
•
Blinking (1 blink per second) indicates that the internal NT1 is
attempting to synchronize with the ISDN terminal devices.
LINE
On when the NT1 S interface and the ISDN terminal device(s) are
synchronized. Also indicates framing between the router and the
ISDN switch.
LAN
On when packets have been sent to or received from the Ethernet
within the last minute.
RXD
Blinks when packets are received from the LAN.
TXD
Blinks when packets are sent to the LAN.
LK1 (Cisco 770 only)
On when the first LAN link of the unmanaged hub is connected.
Blinks (once every 1.5 seconds) when there is a problem with the
connection.
LK2 (Cisco 770 only)
On when there is a connection on the second LAN link of the
unmanaged hub is connected. Blinks (once every 1.5 seconds) when
there is a problem with the connection.
LK3 (Cisco 770 only)
On when there is a connection on the third LAN link of the
unmanaged hub is connected. Blinks (once every 1.5 seconds) when
there is a problem with the connection.