ISDN ACCESS - E1
BUSY RAI
AIS
NOS CRC LOS
PRA-T2
PBX
NETW
2.4.2.7.1 Function of the LEDs
T2 Name
T1 Name
Function
BUSY
BUSY
B-channels busy (red LED lights up if at least 1 B-channel is busy)
RAI (ATD)
RAI
Remote frame alarm (red LED lights up on alarm)
AIS (SIA2M)
AIS
Too many "1's in the 2-Mbit binary train (red LED lights up on alarm)
NOS (MS)
NSIG
Absence of 2-Mbit signal (red LED lights up on alarm)
CRC (TE)
CRC
CRC error (red LED lights up on alarm)
LOS (PVT)
NSYN
Loss of frame alignment (red LED lights up on alarm)
2.4.2.8 APA Boards
This board is used to connect to the analog public network (2, 4 or 8 LR).
1
2
3
4
"Analog Public Access".
APA8
5
6
7
8
The APA board does not support pulse dialing in Australia and New Zealand.
2.4.2.9 LanX-2 Boards
The LanX8-2 and LanX16-2 are second generation boards integrating respectively 1 or 2 Ethernet
Gigabit ports for a Lanswitch/Layer 2 configuration. Any port can be used as an Uplink, as all the ports
are auto MDI/MDIX.
Unlike the 1st generation boards, the LEDs of the A and B ports are both located at the top of the
board. The Led display is as follows:
• Green LED (left) = link status and activity:
• off: link disconnected
• on: link connected
• blinking: link active
• yellow LED (right) = speed:
Chapter
2
Hardware description
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