Telenetics manual Modular Nest Backplane Pin Locations Modular Nest 21 Shown

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	Part No. TEL–09949, Rev A
Pre-Installation Information and Activities	June 2001
Pre-Installation Information and Activities	Page 11 of 34

Refer to Figure 2, which shows pin locations on Modular Nest 21 backplanes.

Modular Nest 9s have a similar layout.

Modem A

Modem B

Pins
Jumpers on	Pins
Left Pin Pairs	Pins

Modular Nest 21 Enclosure, Rear View

Figure 2. Modular Nest Backplane Pin Locations (Modular Nest 21 Shown)

Caution

If you use a 3263 or 3268 (leased line with dial restoral) modem card with a Busy Out backplane, remove jumpers from all four pins, or the modem in that slot will not operate properly. These cards do not support Busy Out.

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Contents 326X Series Modem For More Details on the 326X Modem’s IntroductionAbout the 326X Series Modem Documentation Set Connecting Port Warning Safety InformationInstallation Warning 326X Series Modem Card Backplanes 326X Series Modem Cards and Backplanes326X Series Modem Cards Stand-alone Modems and Enclosure Cards Differences Switching and the A/B LEDHong Kong and the United Kingdom Backplane Jumpers for the Busy Out FeatureTelephone Company Compliance-U.S.A. Models Countries That Support Busy Out How and When is Make Busy Activated?Pre-Installation Information and Activities Pre-Installation Information and Activities Modular Nest Backplane Pin Locations Modular Nest 21 Shown Locating Eight-Position DIP Switch Setting the Modem Card 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 Attaching Ferrite Beads U.S.A., Canada, and Japan Only Removing Audio Cable Connectors From a Modem BackplaneTo 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 Example Setting Control Across GroupsCombining 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 Pin Description Installing or Replacing a 326X BackplaneInstalling or Replacing a 326X Backplane Index ALM 6 ALM LED Usoc