T-Mobile urged the FCC to defer action on 911 regulations for unl...

May 13 p1). But “if the Commission wishes to address” mobile VoIP services, “raising them in a Further Notice, perhaps with an expedited pleading schedule, is by far the better way to go,” T-Mobile said. The firm doesn’t provide VoIP services, but it said “there are a number if promising technologies in development that will permit the offering of VoIP services in conjunction with a [CMRS].” One example is UMA -- a set of industry standards and protocols recently developed for delivery of GSM/GPRS services over Bluetooth or Wi-Fi platforms, it said. “Although it is likely that in a vast majority of circumstances, a CMRS provider deploying a UMA-based VoIP service should be able to route 911 calls to [PSAPs] over its CMRS network, there may be instances where calls cannot be routed in this manner,” T-Mobile said. But there is “absolutely no need” to subject UMA-based VoIP service to 911 rules at this time, since no carrier has deployed UMA, T-Mobile said. The firm and other providers interested in UMA and similar technologies are working on solutions for delivering a 911 call to a PSAP when the carrier’s CMRS network isn’t available. Solutions developed for fixed and nomadic VoIP applications “may not necessarily be the best approaches” for mobile-based VoIP services like UMA, T-Mobile said.