Cable, Public Safety Groups Raise Concerns on Metrom PTC Plan

to initially deploy in the Boston area with the Massachusetts Bay Transportation Authority, in the New York City area with the New York City Metropolitan Transportation Authority and in Southern California with the Los Angeles County Metropolitan Transportation Authority. NCTA and ACA cited concerns about protecting the 3.7-4.2 GHz C-band: “Thousands of receive-only earth stations operated by NCTA and ACA members in this band receive television programming by listening for faint signals transmitted from satellites operating over 35,000 km above the earth. The ‘link margins’ of these signals are narrow, leaving little room for error and rendering them highly susceptible to harmful interference.” NPSTC raised concerns about "potential interference to the public safety 4.9 GHz band from the applicant’s implementation" and said the FCC should only a waiver with conditions to protect that band. Metrom said the request didn’t generate any opposition, at least in initial comments: That "illustrates the non-controversial nature of the Waiver Request and thus clears the way for its expedited processing and approval.”