Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
7.4.3 SETTING CHANNEL MODULE TIME SLOTS
1. In each direction of transmission, always set up the two channel modules at either end of a new
channel to the same time slot value(s). That is, on a channel between Locations 1 and 2, the
transmit time slot at Location 1 must be the same as the receive time slot at Location 2, and the
receive time slot at Location 1 must be the same as the transmit time slot at Location 2.
2. Where possible, use the same time slot in both directions of transmission. This is not a
requirement, but should reduce the chance of making record keeping errors.
3. Always select time slots that are not occupied by other channels in any T1 facility traversed by
the new channel. In drop/insert Linear systems with four or more locations, be careful not to
ignore time slots occupied by channels between intermediate drop/insert multiplexers.
4. The timeslot for the newly added module(s) must be mapped in the DACS module to the
appropriate ports.
7.4.4 CHANNEL MODULE INSTALLATION PROCEDURE
1. At Location 1, install and wire the Module Adapter provided with the channel module.
2. Install the channel module at Location 1.
If an alarm or alert indicator turns on, remove the channel module immediately.
3. If available, activate the local (equipment) loopback on the channel module itself and perform
local loopback tests on this module (See the individual channel module manual for details).
4. Before leaving Location 1, be sure to remove the channel loopback. Also make sure that no
alarms or alert indicators are on.
5. At Location 2, install and wire the Module Adapter provided with the second channel module.
6. If available, activate the local (equipment) loopback on the channel module itself and perform
local loopback tests on this module (See the individual channel module manual for details).
7. Remove the channel loopback.
8. If desired, perform end-to-end tests or single-ended (far-end loopback) tests with the other site.
9. Make sure no alarm or alert indicators are on.
M-DACS-T1 RFL Electronics Inc.
October 25, 2004 7-22 (973) 334-3100
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