TABLE 13


LOCAL TRANSMISSION TECHNOLOGY
(BELL OPERATING COMPANIES)


MAJOR INTEROFFICE TRANSMISSION LINKS



YEAR END   TOTAL     COPPER          FIBER          RADIO


 1990    2,895,117  1,092,041 37.7%  ######  60.0% 65,092  2.2 %
 1991    3,283,956  1,048,545 31.9   ######  65.6  81,368  2.5
 1992    3,570,147   869,052  24.3   ######  73.1  90,910  2.5
 1993    4,020,454   803,035  20.0   ######  77.8  90,682  2.3
 1994    4,520,274   569,428  12.6   ######  85.0  107,432 2.4






WORKING TELECOMMUNICATIONS CHANNELS



YEAR END   TOTAL     COPPER          FIBER          OTHER


 1990     ######  *  ######   86.8%  ######  2.9 %      0  0.0 %
 1991     ######     ######   96.1   ######  3.9    2,347  0.0
 1992     ######     ######   94.8   ######  5.2      238  0.0
 1993     ######     ######   93.6   ######  6.4    1,427  0.0
 1994     ######     ######   92.3   ######  7.7    1,440  0.0


SOURCE:  1990-94 REPORTED IN ARMIS 43-07.

*  INCLUDES SOME OTHER CHANNELS.