- 9. MTAS
- 10. INTEREXCHANGE COMPETITION
- The overwhelming number of long distance
calls within the NANP service area are carried by national interexchange
carriers (IXC) such as AT&T or MCI. The subscriber's connection to
the national IXC is made automatically at the COX by the local carrier
using subscriber lists supplied by the national IXCs.
- Independent IXCs are now entering the
telecommunications market however, permitting subscribers of the national
IXCs to occasionally place long distance calls through the independent
IXCs when favorable rates dictate. To take advantage such rates however
requires the subscriber to include lengthy identifier codes to be included
in the address to identify the independent IXC, generally five additional
digits. In contrast MTAS implementation will permit interexchange carrier
competition on a very simplified basis. MTAS does require however that
the access code <n> be restricted to the single value of <1>
for subscribers of national IXCs and <0> for independent carriers.
- The two digits <yz> following the
access code <0> comprise the independent IXC identifier code, to
be followed by the area code. The group <0yz> functions as an access
code. The identifier codes <yz> can accommodate 100 independent IXCs
with identifiers ranging from <00> to <99> and functions solely
for accounting purposes.
11. MTAS INTEGRATION