Carrier Access Network Device Axxius 800 - Manual (Page 439)

Axxius 800 - Release 2.2 13-9
Quad DS1 ADPCM Card
Card Configuration
Cross-Connects
It is important to note that all timeslots are cross-connected in pairs. The actual pairs
that can be cross-connected are dependant upon which of the 3 supported mappings are
set using the set (ds1 card) adpcm map command.
Map1
l Channels 1-12 and 14-23 are compressed into 11 DS0s (2 to 1 compression)
l Channel 24 is used for 64K non-compressed data (mapped to channel 12)
l Channel 13 is idle (cannot be used)
l Channel pairing is as follows:
1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 14/15, 16/17, 18/19, 20/21, 22/23 (mapped to
channels 1-11)
Note: 13 and 24 are not included in the pairing. See above bullets.
Map2
l Channels 1-24 are compressed into 12 DS0s (2 to 1 compression)
l Channel pairing is as follows:
1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 13/14, 15/16, 17/18, 19/20, 21/22, 23/24
(mapped to channels 1-12)
Map 3
l Channels 1-22 are compressed into 11 DS0s (2 to 1 compression)
l Channel 24 is used for 64K non-compressed data (mapped to channel 12)
l Channel 23 is idle (cannot be used)
l Channel pairing is as follows:
1/2, 3/4, 5/6, 7/8, 9/10, 11/12, 13/14, 15/16, 17/18, 19/20, 21/22 (mapped to
channels 1-11)
Note: 23 and 24 are not included in the pairing. See above bullets.
Example: connect 2:1:1 2:4:1
The above example will connect the ADPCM pair 1 (which are
actually channels 1 and 2) to channel 1 (now compressed) on port 4.
Example: connect 2:1:1-12 2:4:1-12
With Map 1, the example will connect the ADPCM pairs 1-11 (which
is actually channels 1-23 - no 12) to channels 1-11 (now compressed)
on port 4 and channel 24 (12) to channel 12 (non-compressed data).