38
Front panel
Figure 33 Front panel
(1) TX interface
(2) RX interface
(3) Captive screw
(4) Loopback/alarm LED (LP/AL)
(5) Carrier signal LED (LINK/ACT)
LEDs
Table 47 LED description
LED
Status
Description
LINK/ACT
Off
No carrier signals are being received.
On
Carrier signals are being received.
Flashing
Data is being transmitted or received.
LP/AL
Off
No loopback or alarms occur.
On
The interface is in loopback state.
Flashing
A minimum of one alarm of the type of AIS, LFA, or RAI has
occurred.
•
LFA
—Loss of frame alignment.
•
AIS
—Alarm indication signal.
•
RAI
—Remote alarm indication.
Interface specifications
Table 48 Interface specifications
Item
Specification
Connector type
SMB
Number of interfaces
2
Interface standards
•
G.703
•
G.704
•
G.752
•
AT&T TR 54014
•
AT&T TR 62415
•
ANSI T1.107
Interface speed
44.736 Mbps
Cable type
75-ohm T3 coaxial cable
5
4
3
2
1