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Topic: P25

In the News (Fri 25 Dec 09)

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Hugh Jackman

	M/A-COM Wireless Solutions - Tyco Electronics
		fully meets the NTIA mandate and also satisfies the DoD policy for P25 compliance.
		M/A-COM has combined the benefits of our IP-based network-centric solution with the standard common-air-interface of P25.
		combines the global ubiquitous IP infrastructure standard with the P25 digital over-the-air protocol.
	www.macom-wireless.com /products/p25 (111 words)

	MRT Technology Update: P25
		P25 officials say such comparisons are unfair to both standards, which were developed under considerably different circumstances to address significantly different markets.
		P25, instead, is the basis for the ultimate solution: a nationwide system of interoperable equipment designed and built using a consistent set of engineering standards.
		P25 currently is being implemented by a large number of organizations, according to Kenneth Ballard, vice president and manager of technology at land-mobile-radio consultancy firm CTA Communications.
	mrtmag.com /techupdate/p25 (2650 words)

	Design Issues For P25 Digital \| National Interop
		Unfortunately, we must qualify the statement that “all P25 features are available and compatible with P25 radios sold by all manufacturers” since of course some of the manufacturers are meeting the letter of the law, but not the intent, and have eroded their compliance with the standard.
		A P25 system can be programmed to accept text messages, and even allow individual field radios to send text messages (the user interface is so restricted that we generally recommend against this method, or to at least restrict it to “canned” messages such as “acknowledged”).
		P25 radios can be programmed to permit direct calling from one field radio to another (or from the dispatcher to a field radio), which allows a radio to be left silent until needed, similar to the operation of a cell phone.
	www.nationalinterop.com /solutions_p25.html (1333 words)

	APCO P25 Interoperability
		The term interoperability refers to radio equipment in compliance with APCO P25 specs, regardless of the manufacturer, that must be "interoperable" or able to communicate and work together in harmony.
		With pure APCO P25 network interoperability, a public safety agency may be able to use one manufacturer for basic infrastructure, another for mobile and portable radios.
		APCO P25 interoperability means that all compliant radio equipment of any manufacturer must share the same basic functionality and be capable of working with other APCO P25-compliant equipment.
	www.relm.com /APCO_P25_interoperability.asp (155 words)

	The Genesis Group - P25 (Project25)
		GenSZAI and NetVista for Motorola Astro P25 ATIA
		P25 is the standard of federal agencies for digital radio systems, so interoperability between all levels of government will not be prevented by use of incompatible technologies.
		Through P25, systems have enough capacity to handle calls and allow room for growth, even in areas where the spectrum is crowded and it is difficult for agencies to obtain licenses for additional radio frequencies.
	www.genesisworld.com /P25/default.asp (841 words)

	Phase One P25 First Look Review
		The P25 uses Compactflash cards, and with 4Gb Microdrives now available, and relatively inexpensive, it's a toss-up as to which approach is preferable.
		The P25 has neither, and after more than 4 hours of continuous use on a 20C day (68 F) its metal case was totally cool to the touch.
		The P25 did a remarkable job of holding detail in both, and the colour purity of the balloons is easy to see.
	www.luminous-landscape.com /reviews/cameras/p25-firstlook.shtml (6500 words)

	Project 25 (Site not responding. Last check: )
		P25 is applicable to land mobiel radio (LMR) equipment authorized or licensed, in the U.S., under the National Telecommunications and Information Administration (NTIA) or Federal Communications Commission (FCC) rules and regulations.
		However, use of such equipment is not limited to public safety, and P25 equipment has also been selected and deployed in other private system applications, for example, to serve the needs for a high-quality, secure digital radio system for a railroad system, including rolling stock, personnel and transportation vehicles.
		P25 Phase II implementation involves time and frequency modulation schemes (e.g., TDMA and FDMA), with the goal of improved spectrum utilization.
	www.tiaonline.org /standards/technology/project_25 (1037 words)

	BLUE BAMBOO- P25
		The P25 printer from Blue Bamboo is the perfect printer for most portable and wireless applications.
		Designed to meet the needs of mobile applications, the P25 is a thermal printer with a long lasting battery and infra-red connectivity that you can take anywhere.
		The exceptional value of the P25 is based not only on its low cost, but on its high quality, durability and numerous features generally available only in much higher priced printers.
	www.bluebamboo.com /P25.htm (189 words)

	P25 — What It Is and What It Isn’t (Site not responding. Last check: )
		Project 25 (P25) is one effort to create interoperability across platforms.
		However, what is presently included in the P25 standards and what are future enhancements has been confusing to many.
		IWCE brings you a workshop on P25 to clarify what it is and what it isn’t.
	iwceexpo.com /attendees/P25 (107 words)

	P25
		If you are reading this then you probably know what a P25 back is. The title of this article is so un-snappy that you are unlikely to have stumbled this way without having at least a rough idea of what Phase One backs are all about.
		All in all the P25 is a serious tool devoid of fripperies which makes it easy to use in the field and reduces the chances of something going wrong.
		The camera was pointed directly at the ground which meant that the P25 was pointed directly into the, albeit light, rain.
	www.auspiciousdragon.net /photography/articles/photoarticle010.html (2664 words)

	p25/Cdk5-mediated retinoblastoma phosphorylation is an early event in neuronal cell death -- Hamdane et al. 118 (6): ...
		correlated with p25 expression was the phosphorylation of the
		Concomitant with this, p25 expression was analysed during the kinetics by antibody against the p35 C-terminus.
		The lower side of membrane was analysed by immunoblotting for the levels of p25 and Cdk5, which attests to the presence of equivalent amounts of crude lysate in each kinase reaction.
	jcs.biologists.org /cgi/content/full/118/6/1291 (4848 words)

	Icom America \| Review \| P25 Communications
		For agencies desiring to implement a P25 solution right away, digital versions are delivered P25-compatible, while those who choose to migrate over time are advised to deploy analog versions and upgrade with the appropriate firmware/software when they are ready to convert to digital.
		With built-in P25 IMBE vocoding and P25 OFB DES encryption, the DRB-25 may be connected directly to existing tone-based remote and console equipment using 2-watt and 4-watt E/M circuits.
		Though it may yet be a few years off, a P25 trunking standard is on the horizon, but agencies that are purchasing equipment today need an assurance that their investment in conventional equipment will not be wasted.
	www.icomamerica.com /reviews/p25 (1439 words)

	African Safari Photo Workshops from Andy Biggs Photography - Phase One P25 Review
		The rear display on the P25 can use artificial or ambient light to illuminate the display, so viewing in sunny daylight is very useful as it is quite bright.
		I have to remind myself that the P25 is a ground breaking device, as it is not only a full frame 645 sensor, but it is also untethered, allowing one to break free from being bound to a laptop or desktop computer.
		But I believe the P25 is such an amazing device because it is mated with Capture One, already a capable tool for other RAW conversions, and is necessary for converting raw files from the P25.
	www.andybiggs.com /article_phaseonep25.html (912 words)

	H1/Proback 645H Experience
		Here a back like the P25 is right now the only digital ticket if you want to use a 4x5 digitally in the field (remember that all cables may call for disaster).
		The P25 provides an auto preview mode and you can control the exposure using a well readable histogram (could be slightly brighter outdoors).
		The use of the P25 on the Hasselblad H1 was painless and fun.
	www.outbackphoto.com /reviews/equipment/hasselblad_h1_P25/h1_p25.html (1120 words)

	Basic P25 radio buyers guide: Technology at Officer.com
		For example, all P25 portable and mobile radios must be capable of mixed-mode operation, meaning the new digital radios must be able to talk to and hear the older analog radios and vice versa.
		Remember that P25 was supposed to level the playing field and spur open competition that would, for one thing, help drive down the significant costs of digital LMR technology.
		Given the P25 bedrock foundation for digital LMR, however, and the interoperability factor, a cost/benefit analysis of each proposed option and value-add may be appropriate and result in savings, again helpful under tight budgets.
	www.officer.com /article/article.jsp?id=25144&siteSection=20 (1280 words)

	1Ds MKII Vs. P25
		At ISO 50 and 100 on the P25, and ISO 100 on the Mark II, there is essentially no noise visible.
		The three line colour overlay of the RGB histogram of the P25 is a much better implementation, though I wish that the P25 allowed a flashing highlight warning on the same screen as the histogram.
		Walking around the streets of a foreign city with a Contax 645 and P25 is unacceptable for a number of obvious reasons.
	www.luminous-landscape.com /reviews/cameras/1ds-mk11-vs-p25.shtml (5484 words)

	Project 25 (Site not responding. Last check: )
		Project 25 (P25) is an industry-wide effort to develop a voluntary standard for uniform digital two-way radio for public safety organizations.
		P25 is defined in the published ANSI/TIA102 documents enabling migration from today’s radio systems to desired levels of interoperability directly impacting first responders.
		This is partly due to the ability of P25 systems to be configured for compatibility with older analog mobile and portable radios, allowing adopters of the P25 standard to purchase new system equipment without replacing all of their subscriber radios.
	www.interoperability.publicsafety.virginia.gov /p25.html (1526 words)

	Phase One P25 Back Field Report
		My choice of the P25 was based in part on the fact that as of October, 2004 when I placed my order with Vistek in Toronto, the P25 was the only all-in-one 22MP back available for field work.
		One nit that I'd pick with the P25 set-up is that you can't have a flashing highlight warning and a histogram at the same time.
		The Phase One P25 back, is, for the moment at least, (Winter 2004/05), the king of the medium format hill – at least when it comes to portable units for on-location use.
	www.luminous-landscape.com /reviews/cameras/p25-field.shtml (4271 words)

	Raytheon JPS Communications
		The conversion to P25 functionality is accomplished through a sophisticated manipulation of the baseband audio which leaves existing RF infrastructure in place.
		Digital data transmissions from P25 mobile and handheld units are received by an existing analog base station, whose baseband audio is passed on to the P25CC.
		This audio is processed by Ehterstack's Interoperable P25 Base Station Protocol Stack software which then deciphers the digital data and sends P25-modulated baseband audio to the analog base station for transmission to the field units.
	www.jps.com /p25cc (376 words)

	D-Star vs P25
		However, here in Southwest Idaho Public Safety is moving to P25 Statewide and as a member of the EmComm community I'd like comments on why we should continue with D-Star when P25 appears to be the international standard.
		If Motorola were to grant P25 licenses to manufacture amateur equipment with P25 technology, then there is probably no leagal reason why we couldn't adopt the standard.
		P25 systems tend to be trunked systems which are not commonly used in amateur service, so that part of P25 technology doesn't bring us much value for the cost.
	www.icomamerica.com /support/forums/tm.asp?m=1686&mpage=1&key=P25& (2234 words)

	Toshiba Satellite P25 Notebook Review (pics, specs)
		The P25 is one stylish notebook, from its blue metallic top to its Silver metallic insides and high gloss fl accents.
		If you have the P25 placed on a desk it might also be easier to access the drive from a front location.
		The P25 has virtually no noticeable noise to speak of, even though it is a large notebook and you would expect for it to generate quite a bit of sound.
	www.notebookreview.com /default.asp?newsID=2073 (1722 words)

	Phase One P25 vs. SLR/n: Kodak SLR Talk Forum: Digital Photography Review
		A tripod was used for both shots, P25 set to it's base ISO of 50 and SLR/n to 160 ISO.
		On the P25 I used the HC 150, f3.2 @ f8 with 1/64 sec, SLR/n was used with 105DC/f2 @ f8 and 1/180 sec.
		The display on the P25 back is bad and every 250,- camera has a better one, but the most usefull thing on a display is the histogram anyway and it's possible to re-check composition on the P25 LCD.
	forums.dpreview.com /forums/read.asp?forum=1026&message=12374036 (293 words)

	Welcome to P25.com from Aeroflex
		Now Available: Software Version 1.9.2.1 with NEW P25 Eye Diagram
		Project 25 is a public safety communications standard dedicated to ensuring interoperability in communications.
		P25, as a new digital radio standard, requires new test requirements and the solution of choice is the 2975 Project 25 Radio Test Set.
	www.p25.com (0 words)

	Rega P25 Turntable (Site not responding. Last check: )
		The P25 is a celebration designed and produced during our twenty-fifth year manufacturing specialist hi-fi products.
		The P25 carries a market leading extremely high quality dust cover made from the highest quality acrylics.
		The P25 is now in its final production phase and will shortly becoming to an end to make way for the exciting P5 and P7 turntable models.
	www.rega.co.uk /html/p25.htm (290 words)

	P25 - Wikipedia, the free encyclopedia
		Project 25 (P25) is a suite of standards for digital radio communications for use by federal, state/province and local public safety agencies in North America to enable them to communicate with other agencies and mutual aid response teams in emergencies.
		P25 standards use the Improved Multiband Excitation IMBE vocoders which were designed by DVSI to encode/decode the analog audio signals.
		P25 may be used in "conventional" mode without any intervening equipment between 2 radios, or in a trunked mode where traffic is automatically assigned to one or more voice channels by a Repeater or Base Station.
	en.wikipedia.org /wiki/P25 (967 words)

	APCO P25 Interoperability (Site not responding. Last check: )
		The term interoperability refers to radio equipment in compliance with APCO P25 specs, regardless of the manufacturer, that must be "interoperable" or able to communicate and work together in harmony.
		With pure APCO P25 network interoperability, a public safety agency may be able to use one manufacturer for basic infrastructure, another for mobile and portable radios.
		APCO P25 interoperability means that all compliant radio equipment of any manufacturer must share the same basic functionality and be capable of working with other APCO P25-compliant equipment.
	www.smartcommunications.us /catalog.php?item=378 (166 words)

	Neurotoxicity induces cleavage of p35 to p25 by calpain: Nature
		Conversion of p35 to p25 causes prolonged activation and mislocalization of cdk5.
		(1–42) induces the conversion of p35 to p25 in primary cortical neurons.
		These observations indicate that cleavage of p35 to p25 by calpain may be involved in the pathogenesis of Alzheimer's disease.
	www.nature.com /doifinder/10.1038/35012636 (300 words)

	Mitotic-like Tau Phosphorylation by p25-Cdk5 Kinase Complex -- Hamdane et al. 278 (36): 34026 -- Journal of Biological ...
		Representative immunoblots from mock and p25 tetracycline-untreated (–Tet) and -treated (+Tet) cells are shown.
		Cells were differentiated by 7 days of NGF treatment, and then p25 expression was induced by tetracycline during the indicated times (24, 48, and 72 h) in differentiation medium.
		Noninduced p25 cells maintained in differentiation medium were used as controls.
	www.jbc.org /cgi/content/full/278/36/34026 (4667 words)

	[audioConnection] arcam fmj p25 power amplifier (Site not responding. Last check: )
		The FMJ P25 is the perfect partner to the A22 in a high quality bi-amplified set-up, with suitable bi-wirable loudspeakers.
		The P25 is also very flexible in that it can incorporate a third channel power amplifier module.
		For maximum ease of operation the P25 power amplifier has a remote control connection which allows auto power on from the A22 amplifier.
	www.audioconnection.com.au /product.asp?id=115 (222 words)

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