Nextel made a follow up filing at the FCC, providing technical ju...

a paper by duplexer manufacturer Agilent, which found that safe use of the spectrum is possible. A CTIA-led group, including other wireless carriers and technology makers, has weighed in against opening the band for auction. Nextel argued in an ex parte filing that using existing technology Agilent can manufacture a partial-band duplexer that includes H-block “with out-of-band-emissions performance identical to the duplexers” used in existing PCS handsets. Nextel said the manufacturer acknowledges it can’t produce a full-band A- H block duplexer. But the filing argued that interference shouldn’t be a concern. “The possibility of mobile-to-mobile interference depends entirely on the coincident occurrence of numerous events,” Nextel advised: “Nextel believes these events are highly unlikely to occur simultaneously.” Nextel said even if they did occur at the same time “one of the many requisite precursors for potential interference that Agilent identifies is that both handsets must be at the very edge of coverage: The interfering handset must transmit at maximum power and victim handset must operate at maximum sensitivity.” Nextel, which is scheduled to get adjacent G- block spectrum as part of the 800 MHz rebanding plan, is viewed by some of its peers as the carrier most likely to benefit from an H-block sale.