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

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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.

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Contents 326X Series Modem Introduction About the 326X Series Modem Documentation SetFor More Details on the 326X Modem’s Safety Information Connecting Port WarningInstallation Warning 326X Series Modem Cards and Backplanes 326X Series Modem Cards326X Series Modem Card Backplanes Switching and the A/B LED Stand-alone Modems and Enclosure Cards DifferencesBackplane Jumpers for the Busy Out Feature Telephone Company Compliance-U.S.A. ModelsHong Kong and the United Kingdom How and When is Make Busy Activated? Countries That Support Busy OutPre-Installation Information and Activities Pre-Installation Information and Activities Modular Nest Backplane Pin Locations Modular Nest 21 Shown Setting the Modem Card DIP Switch Locating Eight-Position DIP SwitchModem Rear Panel DIP Switch Functions Switch Number Setting Cabling the 3262 and the 3267 Dual Dial Modem Cards Cabling the 3262 and the 3267 Dual Dial Modem CardsDTE NC BUS Mstr OUT Comm Removing Audio Cable Connectors From a Modem Backplane Attaching Ferrite Beads U.S.A., Canada, and Japan OnlyTo release the connector 326X Series Modem-Cabling to a Network Manager Leased or Dial Line Network Managed Command Flow Path Filler Panels NC Port and Bus Master Slots Are within Shaded Areas Setting Control Across Groups ExampleCombining NC Ports With Backplane NMS Bus DIP Switches Daisy-Chaining NC Ports Card Modems to Stand-alone Modems Data 9600 T/D? Preparing the 9110 DMS for 326X Series Card Modems Part No. TEL-09949, Rev a Removing a 326X Backplane Removing a 326X Backplane Installing or Replacing a 326X Backplane Pin DescriptionInstalling or Replacing a 326X Backplane Index ALM 6 ALM LED Usoc
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