UID422917
威望15
金钱151287
交易诚信度0
主题30
帖子1124
注册时间2007-6-25
最后登录2024-11-17
高级会员
交易诚信度0
注册时间2007-6-25
|
楼主 |
发表于 2009-6-29 22:23
|
显示全部楼层
再贴一点CR的无绳电话选购的tips,希望有所帮助
Getting started
When shopping for a phone, you'll need to decide whether you want a phone that uses analog or digital technology. Generally, analog phones are less expensive and have better voice quality, while digital models offer better security and are more immune to interference. But each technology has equally significant drawbacks. And, because cordless phones might interfere with other wireless devices and home networks, you'll also have to consider which frequencies the phone uses.
And you'll have to decide whether you want an answerer. Many people still do, despite the ubiquity of cell phones with voice-mail capability. Single- and multiple-handset phones come in versions with a built-in answerer. Such phones often cost little more than comparable phone-only models and take up about the same space. If you're considering an answerer, you need to make these two additional decisions.
Features such as a speaker phone for hands-free communication, a keypad for dialing from the base, and a large LCD screen can help you get the most from your phone.
------------------
Types
A main distinction among types of cordless phones is the way they transmit their signals.
Analog phones
These are the least expensive type and tend to have better voice quality than digital models, though their range is somewhat shorter. They are also unlikely to interfere with other wireless products. But analog transmission isn't very secure; anyone with an RF scanner or comparable wireless device might be able to listen in. Analog phones are also more likely than digital phones to suffer occasional static and RF interference from other wireless products. Also, multiple-handset-capable phones can't conference handsets with an outside party, and the number of handsets that can be supported by the base unit is typically limited to two.
Digital phones
These provide an added measure of security and are more immune to RF interference. Their range might be slightly better than that of analog phones. Note that some phones—usually the 2.4-GHz or the multiple-handset capable phones with handset conferencing capabilities—use such a wide swath of the spectrum even in standby mode that they might interfere with wireless LAN, baby monitors, and other wireless products operating in the same frequency band. The latest phones use a technology called Digital Enhanced Cordless Telecommunication, which addresses the interference problem by using the 1.9-GHz frequency band that was recently reserved by the FCC for voice-only applications. DECT phones also tend to have the longest talk time. Some digital models support up to 12 handsets from one base and allow conferencing of handsets.
To be sure you're actually getting a digital model, check the packaging carefully. Look for wording such as "digital phone," "digital spread spectrum or DSS," "frequency-hopping spread spectrum or FHSS," or digital enhanced cordless telecommunication or telephone or DECT. Phrases such as "phone with digital security code," "phone with all-digital answerer," or "spread spectrum technology" (not digital spread spectrum) all denote phones that are less secure. Phones that use dual-band transmission might indicate the higher frequency in a larger print on the packaging. If you want a true 5.8- or 2.4-GHz phone, check the fine print. If only the frequency is prominently shown on the package, it's probably analog.
---------------
FeaturesStandard cordless phone features include handset earpiece volume control, handset ringer, last-number redial, a pager to locate the handset, a flash button to answer call waiting, and a low-battery indicator.
LCD Screen
Found on many handsets and on some bases, this can display a personal phone directory and useful information such as the name and/or number dialed, caller ID, battery strength, or how long you've been connected. Caller ID displays the name and number of a caller and the date and time of the call if you use your phone company's caller ID service. If you have caller ID with call waiting, the phone will display data on a second caller when you're already on the phone.
Two-line support
These can receive calls for two phone numbers--useful if you have, say, a business line and a personal line that you'd like to use from a single phone. Some of the phones have two ringers, each with a distinctive pitch to let you know which line is ringing. The two-line feature also facilitates conferencing two callers in three-way connections. Some two-line phones have an auxiliary jack data port to plug in a fax, modem, or other phone device that can also be useful.
Speakerphone
This cordless phone feature offers a hands-free way to converse or wait on hold and lets others chime in as well. A base speakerphone lets you answer a call without the handset; a handset speakerphone lets you chat hands-free anywhere in the house as long as you stay within a few feet of the handset.
Base keypad
This supplements the keypad on the handset. It's handy for navigating menu-driven systems because you don't have to take the phone away from your ear to punch the keys. Some phones have a lighted keypad that either glows in the dark or lights up when you press a key, or when the phone rings. That makes the phone easier to use in low-light conditions. All phones have a handset ringer, and many phones have a base ringer. Some let you turn them on or off, adjust the volume, or change the auditory tone.
Headset jack
Many cordless phones have a headset jack on the handset and include a belt clip for carrying the phone. This cordless phone feature allows hands-free conversation anywhere in the house. Some phones have a headset jack on the base, which allows hands-free conversation without any drain on the handset battery. Headsets are usually sold separately for about $20.
Auto-talk
Other convenient cordless phone features include auto-talk, which lets you lift the handset off the base for an incoming call and start talking without having to press a button, and any-key answer. Some phones have a side volume control on the handset conveniently placing the control for adjusting volume while you're on a call.
Battery holder
Some phones provide a battery holder for battery backup--a compartment in the base to charge a spare handset battery pack or to hold alkaline batteries for base-power backup, either of which can enable the phone to work on a traditional landline service if you lose household AC power. Still, it's wise to keep a corded phone somewhere in your home.
Multiple handsets
Some multiple-handset-capable phones allow conversation between handsets in an intercom mode and facilitate conferencing handsets with an outside party. In intercom mode, the handsets have to be within range of the base for handset-to-handset use. Others lack this handset-conferencing capability; they allow you to transfer calls to another handset, but they don't allow more than one handset to take part in a call. Still other phones allow direct communication between handsets, so you can take them with you to use like walkie-talkies. Some phones can register up to 12 handsets, for example, but that doesn't mean you can use all 12 at once. You might be able to use two for handset-to-handset intercom, while two others conference with an outside party. With some models, it's possible to buy a replacement handset and charging cradle in case one breaks. With others, you'll have to purchase an entirely new system to keep that extension.
Caller ID
Some phones have Caller ID alerts. A phone with distinctive ring capability allows you to hear who is calling by associating the calling number with a specific ring tone. Some are visual, so you can tell who's calling by the handset display or the antenna flashing a particular color. Phones with talking Caller ID, also referred to as Caller ID announce, speak the name of the caller, which is useful because you don't have to view the display to know who's calling.
Mailboxes
Most phone-answerers have one mailbox. Some answerers have several mailboxes to which a caller can direct a voice message to an individual family member, or to separate business and personal calls, for example. That allows the convenience of listening to messages meant just for you.
Advanced playback controls
Most answerers can skip to the next message, skip back to a previous message, and repeat a message. But some also have fast playback for listening to messages more quickly, slow playback for deciphering a garbled message, and rewind to replay any message segment. Some models also have an audible message alert, typically a beep, that lets you know you have new messages without having to go look at the answerers' visual new message indicator. Some phones allow you to listen to messages from the handset and might even allow you to access to other answerer functions, such as recording your greeting; that offers more privacy and convenience.
-------------------
Brands
AT&T
This well-known cordless phone brand is actually owned by VTech. It offers a wide range of phones, with and without answering machines, for consumers and small business. Form factors include single- and multi-handset models, cordless-corded combos, and multi-line phones. AT&T still offers stand-alone corded phones. The company has made a serious effort to go green with its packaging.
GE
Thomson uses the GE brand name for consumer electronics in the U.S. and Canada. Its products include a diverse collection of models with and without answering machines. Among its single- and multi-handset models and cordless-corded combos are phones with built-in networking for making calls over the Internet and Bluetooth technology for linking to your cell phone service. Some phones can tap into Internet data services for news, weather, etc[url=].[/url] GE also offers phones for the hearing impaired, and corded models with large buttons for easier dialing. One of its interesting products integrates a phone with a digital picture frame.
Panasonic
The company has long-focused on mid-to-higher priced models in every form factor. Some trademark conveniences found on Panasonic phones include Talking Caller ID, Talking Alarm Clock, and Talking Battery Alert. Some models have Bluetooth technology for linking to your cell phone service or built-in networking for making calls over the Internet. Some models claim to be drop- and splash-resistant, while others have amplified earpieces for the hearing impaired. Panasonic also offers phones with “bone conduction technology” that claims to clarify conversations for people with conductive hearing loss. The technology might also be helpful in noisy environments.
Philips
Part of Philips Consumer Electronics, this cordless phone brand is a relative newcomer to the U.S. cordless market that focuses on high-priced models that use DECT 6.0 technology. Some of its models also have built-in networking for making calls over the Internet.
Radio Shack
This well-known brand offers a small selection of phones, made by several manufacturers, which are sold exclusively through its stores.
Uniden
This market leader in the entry-to-mid-priced category boasts a wide-range of phones for consumers and business. Its specialized offerings include rugged and waterproof handsets, as well as phones for the visually and hearing impaired. Some of its phones have built-in networking for making calls over the Internet.
VTech
This market leader boasts a wide-range of phones for consumers that emphasize technological innovation. It was one of the first companies to introduce the 900 MHz cordless phone in 1991, and one of the first to introduce 5.8 GHz cordless phones in 2002. Its current offerings include a large selection of DECT 6.0 phones. VTech's Lifestyle series of phones include changeable back plates, Bluetooth connections to your cell phone, high-resolution screens, and recordable ring tones. The company also offers a cordless phone with instant-messaging capability. Like its other brand, AT&T, VTech has made serious efforts to go green with its packaging.
---------
Shopping tips
AT&T, GE, Panasonic, Uniden, and VTech account for most of the market. VTech owns the AT&T Consumer Products Division and now makes phones under the AT&T brand as well as its own name. The current trends include phones that support two or more handsets with one base, less inexpensive 5.8-GHz analog phones, and full-featured 1.9, 2.4 and 5.8-GHz digital phones. Many phones now include an additional handset with a charging cradle, often with an option to add more (digital models only). More than a third of the cordless phones sold include a digital answering machine. Price range: $15 and up for single-handset phones, $50 and up with built-in answering machine; $25 and up for multiple-handset phones, $80 and up with built-in answering machine.
Also consider the following when shopping for a phone:
Decide on number of extensions
A single-handset phone is best suited for smaller homes where you're never far from the phone. If your home is too large for that, give first consideration to multiple-handset phones, which support (and usually include) multiple handsets from one base. Each extra handset sits in its own charging cradle, without the need of a phone jack, making it easier to station the handset where you want it. With some models, it's possible to buy a replacement handset and charging cradle. With others, you'll have to purchase an entirely new system to keep that extension. Handset conferencing, available only on digital phones, lets two or more handsets participate on an outside call.
Settle on the features you want
You can expect caller ID, a headset jack, and a base that can be wall-mounted. See Important Features for others. Also check the phone's packaging or download the instruction manual from the manufacturer's Web site to confirm you're getting the features you want. As a rule, the more feature-laden the phone, the higher its price.
Decide which performance nuances matter most to you
Our tests show that most new cordless phones have very good overall voice quality. Some are excellent, approaching the voice quality of the best corded phones. In our latest tests, most fully charged batteries provided 8 hours or more of continuous conversation before they needed recharging. DECT phones averaged more than twice as long. Most manufacturers claim that a fully charged battery will hold its charge at least a week in standby mode. When the battery can no longer hold a charge, a replacement battery, usually proprietary, costs about $10 to $25. Some phones use less-expensive AA or AAA rechargeable batteries. (To find stores that recycle used cordless phone batteries, call 800-822-8837 or go to the Rechargeable Battery Recycling Corp.'s site at www.rbrc.org. Our Web site www.GreenerChoices.org also has advice on this topic.)
Try out the handset if possible
In the store, hold the handset to see whether it fits the contours of your face. The earpiece should have rounded edges and a recessed center that fits nicely over the middle of your ear. Check the buttons and controls to make sure they're reasonably sized and legible.
Don't discard your corded phones
It's a good idea to keep at least one corded phone with traditional landline service in your home, if only for emergencies. Cordless phones-and even corded models connected to VoIP services or fiber-optic networks-might not work if you lose electric power. Neither will a cell phone if you can't get a signal or the circuits are full.
Make sure you can return it
Before buying, check the return policy in case you encounter unexpected problems at home that you can't resolve, such as wireless interference.
[ 本帖最后由 AMG 于 2009-6-29 22:30 编辑 ] |
|
京公网安备 11010602010207号
( 京ICP证041102号，京ICP备09075138号-9 )
狗仔卡
发表于 2009-6-29 22:08
变色卡
