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Workgroup Remote Access Switch 419
LED I
NDICATORS
WAN LED Indicators
* On DMS-100 and NI-1 switches, more than one data link is possible.
•The CH-1 and CH-2 indicators signify activity along their respective B channel:
PRI LED INDICATORS
In the bank of PRI LED indicators, there is one indicator for each B channel (labeled B1 through B23
for T1 lines, and B1 through B31 for E1 lines), a D channel indicator (labeled T1 D for T1 lines, and
E1 D for E1 lines), and a Sync indicator.
As illustrated below, the D channel indicators are dual labeled. Because the 1200 can use either T1
or E1 lines, it is labeled for both. In result, the B16 indicator (B-Channel indicator, number 16) for
T1 line doubles as the E1 D channel indicator, and the B24 indicator for E1 lines doubles as the T1
D channel indicator.
A B channel indicator flashing indicates activity on that B channel. Likewise, a D channel indicator
flashing indicates data link and D channel activity.
D-CHAN LED status One Data Link Multiple Data Links*
off no activity no activity
flashing
(mostly off)
trying to bring up
data link
not all data links are up
flashing
(mostly on)
activity
data link is up
activity
data link is up
on solid no activity
data link is up
no activity
data link is up
CH-1 or CH-2 LED
Status
Description
off no call over channel
flashing Data being passed over channel. Speed of
flashes depends upon number of frames being
sent.
on solid call up, but no data being transferred
SERVICE
TX
RX
10BASE - T
LAN B-CHANNELS E1 ONLY
B2 B4
B6 B8
B26 B28
B22 B24
B18 B20
B14 B16
B10 B12
B30 L1
B1 B3
B5 B7
B25 B27
B21 B23
B17 B19
B13 B15
B9 B11
B29 B31
E1
D
T1
D