User guide

3-22 Encore Multi-port DSU/CSU User GuideÑJuly, 1997
3
¥ AlternateÑYou allocate timeslots in an alternate order, with slots always odd
numbered. Every even numbered slot is unused and Þlled with an All Ones pattern
to maintain pulse density over T1 lines without a clear channel. Use this method to
meet AT&T TR54019A requirements.
¥ ManualÑThe manual method allows you to allocate timeslots in an arbitrary
random order which decreases the likelihood of unauthorized access via in-line
taps.
Switching from Contiguous to Alternate
When you switch from Contiguous to Alternate, slots allocated in a contiguous range
change to an alternate order and the even numbered slots become idle (I). In the menu,
the idle timeslots are designated by a dashed blank line.