Nortel DMS-100 Series Reference Manual page 118

3-94 Datafilling BAS on RSC-S International
Basic call processing
Datafilling table MTAMDRVE
The metallic test access (MTA) network is a matrix of vertical and
horizontal crosspoints. This matrix is like a minibar that connects verticals
to horizontals in the MTA. The MTA tests equipment. The horizontal
connections in the MTA connect the test equipment to the vertical
connections where the circuit lines attach.
The interconnection of a number of smaller minibar circuits can produce an
MTA network of the required size. The minibar circuits are used as building
block components. The NT3X09AA driver allows metallic test access to
remote line concentrating devices. The metallic test access includes the
LCMs off the RCO2. The NT3X09AA circuit measures four vertical by
eight horizontal. The NT3X09BA circuit measures eight vertical by eight
horizontal. The MTA matrix appears in the following figure.
MTA matrix
297-8331-815 Standard 10.01 August 1999
(continued)
0
0
2X50AB
7
15
24
127
The 0, 0 crosspoint of an MTA driver locates the driver in the MTA matrix.
This driver has a vertical start location of 20 and a horizontal start location of 8.
MTA verticals
19 24 32
3X09BA
639