59
Interface LEDs
Figure 62 MIM-8E1 (75-ohm) panel
Figure 63 MIM-8E1-F (75-ohm) panel
Table 92 LED description
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 connection methods
For more information about E1 interface cables, see "E1 interface."
MIM-2T1/MIM-4T1-F
Introduction
• MIM-2T1
The 2-port channelized T1/PRI interface module (MIM-2T1) transmits, receives, and handles
T1 data streams, provides CT1 access, and fulfills the function of ISDN PRI.
• MIM-4T1-F
The 4-port fractional T1 interface module (MIM-4T1-F) and MIM-2T1 module differ in the
following ways:
FT1 operating mode supported by T1-F modules allows only one bundle. The time slots can
only be bundled into one n × 64 kbps or 56 kbps channel, where n=1-24. However, a CT1
module allows of arbitrary grouping of the 24 channels;
T1-F does not support PRI mode.
For a T1 module, the system automatically creates a serial interface for each timeslot bundle formed
on a controller T1 interface.
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