4000 Router Series Interface Module Guide

Attribute Description

Operation mode

• CT1

• ISDN PRI

Services

• Backup

• Terminal access

• ISDN

Interface LEDs

MIM-2VT1 panel is shown in the following figure:

Figure 72 MIM-2VT1 panel

The following table describes the LEDs on the MIM-2VT1 panel:

Table 105 Description for the LEDs on the MIM-2VT1 panel

LED Descri

tion

LINK/ACT

• ON means carrier signal has been received.

• Flashing means data is being received or/and transmitted.

• OFF means no carrier signal has been received.

LP/AL

• ON means the interface is in a loopback.

• Flashing means an AIS, LFA, or RAI alarm signal is present.

• OFF means no loopback or alarm is present.

Note:

AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication

Interface cables and the connection methods

For more information about T1 interface cables and the connection methods, see "T1 interface."