Telenetics Modular Nest manual Stand-alone Modems and Enclosure Cards Differences

	Part No. TEL–09949, Rev A
Pre-Installation Information and Activities	June 2001
	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.

TD	103 TR	108	RI/OH
RD	104 CD	109	RC/NC

125 A/B ALM

326x Ready

RETURN DOWN ACROSS ENTER

The A/B and ALM LED's are not featured in stand-alone modems.

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.