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initially had to have a phone number starting with 671 to have call waiting, since 671 was at that time the only exchange in that area served by one of the new ESS switches), but as demand for it became more widespread, it eventually became available on all phone exchanges as the older equipment was
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button but is much shorter duration, typically 80ms to 100ms, vs. 250ms in North
America. In some networks, pressing R toggles between the calls, similar to North America. However, in most countries there are further options:
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local telephone companies. At first, some smaller municipalities were able to offer customers call waiting only on a specific phone exchange (e.g., phone customers in
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but also introduces an "options" feature that, in conjunction with certain screen-based telephones, or other capable equipment, gives a telephone user the option to:
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crossbar exchanges, such as the ARE11 which, while electromechanical, was also computerised. Other digital systems such as the UK's
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In Europe, call waiting was also introduced in the 1970s with the introduction of the first digital switching systems such as the
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Call waiting was introduced to North
America in the early 1970s when the first generation of electronic switch machines built by
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98:. Call waiting is intended to alleviate the need to have more than one telephone line or number for voice communications.
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Call waiting in Europe uses an "R" (recall) button on the phone. This performs a similar function to a North
American
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86:—and may also switch between calls. With some providers it can be combined with additional features such as
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328:: Send the caller either a custom or telephone-company-generated voice message asking the caller to hold
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A voice announcement, tone or a message on your phone's screen will confirm the service status.
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also supported the service. Switching systems developed in the 1980s such as the German
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lines used for dial-up modem or fax purposes. However, Call
Waiting has no impact on
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305:-telephone calling feature works by combining the services of call waiting with
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R0 – Reject call waiting – This will send the call to voice mail or a busy tone.
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417:. U.S. Department of Commerce, Patent and Trademark Office. 1994. pp. 1–.
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316:: Place the current call on hold to take the second call (not a new feature)
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Official
Gazette of the United States Patent and Trademark Office: Patents
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modem standard. For this reason, call waiting is often disabled on shared
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mobile phones, call waiting is activated by dialing the following codes:
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beep every ten seconds in North
America), call waiting can cause
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Audible tone which indicates an incoming call. 440 Hz 5 ms.
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R1 – Answer the waiting call and hang up on the current call.
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prefix to suspend call waiting for a dialed call. A stutter
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service where a subscriber can accept a second incoming
344:: Add the incoming caller to the existing conversation.
322:: Disconnect the current call and take the second call
137:E10 and System 12. It was also available on some
225:R3 – Merge the two calls for conference calling.
334:: Send the incoming caller to the recipient’s
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185:On most European telephone networks, and
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255:connections to terminate, unless the
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434:Telephone service enhanced features
393:Call waiting product specifications
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365:Analog Display Services Interface
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62:Problems playing this file? See
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82:by placing an in-progress call
243:Since the waiting call uses a
235:also works with call waiting.
222:R2 – Toggle between the calls.
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21:Call waiting (disambiguation)
182:confirms the de-activation.
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294:with Disposition Options.
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259:supports the most recent
389:Call waiting user manual
253:dial-up Internet access
156:also had call waiting.
288:Telcordia Technologies
203:To check status: *#43#
170:In North America, the
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377:Telephones portal
355:Vertical service code
332:Forward to Voice Mail
166:Vertical service code
164:Further information:
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19:For other uses, see
290:) term for Type II
280:Call waiting deluxe
275:Call waiting deluxe
200:To deactivate: #43#
16:A telephone service
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233:Type II Caller ID
197:To activate: *43#
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439:Calling features
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395:from Bell Canada
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247:(for example, a
108:Western Electric
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92:call forwarding
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80:telephone call
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239:Line sharing
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123:phased out.
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88:conferencing
72:Call waiting
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326:Please Hold
112:Bell System
428:Categories
400:References
336:voice mail
212:hook flash
160:Star codes
64:media help
307:caller ID
292:caller ID
180:dial tone
176:star code
96:caller ID
76:telephone
360:Zip tone
349:See also
338:service.
284:Bellcore
245:zip tone
143:System X
139:Ericsson
128:Ericsson
120:Michigan
40:Zip tone
320:Hang-up
301:-based
282:is the
147:Siemens
135:Alcatel
116:Trenton
102:History
84:on hold
391:, and
314:Switch
249:440 Hz
94:, and
299:CLASS
297:This
286:(now
265:voice
257:modem
151:Bosch
74:is a
342:Join
303:POTS
261:V.92
191:UMTS
172:NANP
154:EWSD
269:DSL
189:or
187:GSM
131:AXE
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133:,
118:,
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66:.
23:.
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