Installation and Startup | |
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The line and desktop units will reset and their LEDs will sequence through the startup cycle following any change to the Local Unit Role option. If necessary, log on again by pressing the SPACEBAR several times.
Perform the following steps to install an
1Insert the AC power cord into the power cord receptacle on the ETU rear panel.
2Plug the power cord into a source of 100 V to 240 V, 50 or 60 Hz AC power.
3If configuring the desktop unit as an LTU, power up the shelf and proceed as instructed on pages 25 through 27 and 37 to access the Local Unit Role option in the Config System Settings menu (the default setting is NTU).
4Connect the DTE cables to the 120 or 75 Ω connectors on the
5Connect the HDSL line cable to the HDSL line connector on the ETU rear panel.
HDSL STARTUP AND SYNCHRONIZATIONThe rate selectable LTU holds the configuration settings for the rate selectable NTU. At startup, the LTU first confirms that the NTU is a rate selectable unit. The LTU then configures the NTU with the required settings.
Power up the rate selectable units and observe the synchronization process as follows:
1Power up the shelf or enclosure where the units are installed.
2Confirm the following:
•The HDSL ALM LED is on and the HDSL SYNC LED flashes once per second as the units
•After approximately 60 seconds the HDSL ALM LED is off and the HDSL SYNC LED is steady green. The units are now ready for configuration through the console screen menus.
If the HDSL SYNC LED continues to flash after 90 seconds, the HDSL line is faulty or one of the units is not a rate selectable unit. Check for the correct line units. Test the HDSL line using the loopbacks described in “Testing” on page 60. Front panel loopback (LPBK) LED indications are described in Table 4 on page 6.
The LTU and NTU will reset and their LEDs will cycle through the startup sequence following any change to the HDSL Payload Rate option (see “Configure System Settings” on page 37).
24 | August 9, 2002 |