AT&T Wireless asked FCC for limited waiver of June 30 deadline fo...

it was deploying in GSM markets but that problems hadn’t affected rollout in its TDMA markets. AT&T Wireless said multiple errors in Nokia software that contained TTY solution affected only part of its GSM network. Because “vast majority” of its subscribers are on its TDMA wireless network, it said, “any customer seeking TTY compatibility will be able to receive nationwide service” at comparable price on network. AT&T Wireless told agency it wanted extension for affected GSM markets for 3 months after date that Nokia delivered product for deployment. It said it received delivery of partly corrected software for lab testing Mon. If corrected software passes critical lab and field tests, carrier said it expected to roll out TTY solution in all operational GSM markets using that equipment by Sept. 30. AT&T Wireless said it didn’t foresee any problems in meeting June 30 deadline in its Ericsson TDMA markets. All Lucent TDMA markets have been fully enabled and all but 2 Nortel markets have TTY solutions deployed, with rest expected to receive upgrades this week. In June 7 filing, AT&T said Ericsson solution was 70% deployed and it expected to complete rollout in 2 weeks. Problems with Nokia solution surfaced in late April during field verification tests, AT&T said, and by May 15 eight errors had been pinpointed. Some bugs damaged network capacity or performance, “directly impacting basic voice and data services for customers,” company said. “Others created complete network failures.”