Motorola V186 User Manual - Page 178

Appendix B - FCC Information Spectrum and Regulatory Update to be applied. In a subsequent decision, (FCC MO&O96-492) the FCC clarified their intent and restated the previous classes of data operations. Key to the issue of the type of operation is determining the actual path of the signaling through the radio. The FCC acknowledged a difference between signals that pass through a radio's external microphone port and those that do not. The former path, since it includes FCCproscribed audio filters does not have to meet the data rate standard. The interpretation of this statement however still allows for some confusion. If the signal is not required to meet the data efficiency standard, is it still considered data? The consensus opinion is that it is audio and can be considered as telephony, and not telemetry. This seemingly minor detail consideration is important, since it will influence what radio or model of radio that can be used. All Motorola radios carry a F3E designator, not all of them are also certified for F3D or F1 or F2 operation. This interpretation says MOSCAD can use radios only certified for F3E operation. This opinion is based on the consideration that the source of the signal whether microphone or tone modem (MOSCAD) is of concern to the user of the system, but not the licensing party whose only concern is the type of signal, not content. Note however, that this opinion and the FCC stop short of considering this type of signaling used by MOSCAD as voice except for the express purpose of satisfying the data efficiency standards. Narrowbanding Update The FCC set dates for mandatory moves to narrowband channels in February 2003. In December 2004, in response to several Petitions for Reconsideration, they modified the deadlines as follows: • No new applications for operations using 25 kHz channels after 1/1/11 unless they meet the 12.5 kHz efficiency standards2. • No modifications to existing 25 kHz systems that exceed existing interference contours after 1/1/11 unless the equipment meets the 12.5 kHz efficiency standard3 • No equipment capable of 1 voice path per 25 kHz will be certified beginning 1/1/05. (Deadline stayed as of 12/22/04 until FCC rules on issues raised in Third Further Notice in WT Docket 99-87) • No manufacture or importation of 25 kHz equipment beginning 1/1/11 unless it meets the 12.5 kHz efficiency standard4. • Mandatory migration to 12.5 kHz technology: o Non-Public Safety - 1/1/13 o Public safety - 1/1/13 2 One voice channel per 12.5 khz of bandwidth or 4800 bits per second per 6.25 kHz of bandwidth for data 3 Ibid 4 Ibid 174