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Part No. TEL–09949, Rev A
June 2001
Pre-Installation Information and Activities
Page 6 of 34
Stand-alone Modems and Enclosure Cards: Differences
The 326X Series Modem card front panel differs from that of the stand-alone 326X
Series Modem. As shown in Figure 1, the 3262, 3263, 3267, and 3268 Modem cards
have eight front-panel LEDs. Stand-alone 326X Series Modems do not have two of
these:
• A/B LED
• ALM LED
These two LEDs are described here.
Figure 1. 326X Series Modem Card Front Panel
A/B Switching and the A/B LED
With the 3262 and the 3267 Modem card (dial-only), two modems (A and B) share a
single card and front panel. One modem controls the front panel display and LEDs at
a time. The A/B LED indicates which front panel display and LEDs you are
currently viewing. When the A/B LED is:
• Lit (green), modem A front panel information is being displayed
• Not lit, modem B front panel information is being displayed
To toggle between the displays, hold down , and press .
Since the 3263 and the 3268 Modem cards (leased line with dial restoral) contain
only one modem, the A/B LED is always lit (green).
ALM LED
The ALM LED lights (yellow) when a test is in progress or a modem failure occurs.
With the Dual Dial Modem card, if one modem fails or is being tested, the ALM
LED lights and remains lit regardless of which modem front panel is displayed.
To find out which modem failed, toggle between the front panels of modems A and
B by holding down , and pressing . The failed modem displays:
ERRORxxx
Note
If modem A has control and the network manager puts modem B into test mode,
modem B’s ALM LED lights.
The A/B and ALM LED's are not featured in stand-alone modems.
104
103
109 108
125
RD
RC/NC
RI/OH
TR
CD
ALMA/B
TD
RETURN DOWN
ACROSS
ENTER
326x Ready