Total Access
®
3000/3010 System Manual
6TADLP740-1E
TOTAL ACCESS 3000/3010
DLP-740
Page 7 of 10
© 2003, ADTRAN, Inc.
Perform Steps Below in the Order Listed
1.6
Channel Mapping Provisioning
Channel mapping is necessary so that the embedded T2s, T1s, or E1s can be routed to
the intended slot of the Total Access 3000/3010 chassis upon being demultiplexed
from the DS-3 data stream. The DS-3 MUX module is capable of mapping T2s, T1s,
and E1s, or any combination thereof, to the Total Access 3000/3010 slots. These
bandwidth mapping options of T2, T1, or E1 are referred to as “mapping schemes.”
A single T2 has a bandwidth of 6.312 Mb/s and can be comprised of either the entire
T2, four T1s, or three E1s.
details how the 28 T1s would be bundled into the
details how the 21 E1s would be bundled into the seven T2s. In
both tables, the assignment scheme, such as T1s #1, #2, #3, and #4 bundled into T2 #1,
is permanent and cannot be changed. This becomes important when mapping in a
scheme other than 1-to-1, which maps T1s 1-28/1-22 to slots 1-28/1-22, respectively.
If mapping in E1 mode, the particular T2 is divided into three E1s and the user would
need to refer to Table 2 to determine which E1s are bundled into the T2. For example,
if mapping E1 #1 to a particular slot, T2 #1 would be divided into E1s #1, #2, and #3.
Please see NOTE below for further instructions if mixing mapping schemes in the
same shelf.
NOTE
It is important to note when channel mapping that the equivalent T2 bandwidth
becomes delegated to the selected mapping scheme until changed. If mapping
in E1 mode, the equivalent T2 bandwidth of 6.312 Mb/s is divided into three
E1s of 2.103 Mb/s each. If mapping in T1 mode, the equivalent bandwidth of
6.312 Mb/s is divided into four T1s of 1.544 Mb/s each. It is not possible
within the bandwidth of a particular T2 to map both E1s and T1s. One T2
could be divided into E1s and another T2 could be divided into T1s and those
E1s and T1s routed to any slot selection.