5-10
MAX Administration Guide
Administering E1 and T1 Services
Using Net/E1 and Net/T1 status windows
A single character represents the status of each channel in the line, as described in Table 5-4.
Displaying FDL statistics
A Facilities Data Link (FDL) is a 4-Kbps digital link between a sender and the telephone
company’s monitors. The FDL uses Extended Superframe (ESF) framing, a framing format
that consists of 24 consecutive frames, separated by framing bits. The telephone company uses
an FDL to check on the quality and performance of T1 lines. It provides information at regular
intervals to your carrier’s maintenance devices. The MAX unit continues to accumulate ESF
performance statistics in the FDL Stats windows, even if you do not choose an FDL protocol.
Your carrier can tell you which FDL protocol to specify.
The FDL Stats windows are the fourth and fifth options listed in the VT100 interface’s status
window Net/T1 window:
10-000 Net/T1
10-300 Line Errors ^
10-400 FDL1 Stats
>10-500 FDL2 Stats
10-600 Net Options
Table 5-4. Channel-status indicators
Channel
status
Mnemonic
Description
.
Not available
The channel is not available because the line is disabled,
has no physical link, or does not exist, or because is set to
Unused
in the Line N profile.
*
Current
The channel is connected in a current call.
-
Idle
The channel is currently idle (but in service).
d
Dialing
The unit is dialing from this channel for an outgoing call.
r
Ringing
The channel is ringing for an incoming call.
m
Maintenance
The channel is in maintenance/backup (ISDN only).
n
Nailed
The channel is marked Nailed in the Line N profile.
x
Drop-and-Insert
The channel is configured for Drop-and-Insert for a DASS
2 E1 line or DPNSS E1/PRI line.
o
Out of Service
The channel is out of service (ISDN only).
s
ISDN D channel
The channel is an active D channel (ISDN only).
b
Backup ISDN D
channel
The channel is the backup D channel (ISDN only).
