Editing Caller ID (section)

===Type II caller ID===
In 1995, Bellcore released another type of [[modulation]], similar to [[Bell 202]], with which it became possible to transmit caller ID information and even provide call-disposition options while the user was already on the telephone. This not-for-free service<ref name=CWidLAT>{{cite news
  |newspaper=[[The Los Angeles Times]]
  |url=https://www.latimes.com/archives/la-xpm-1999-aug-19-fi-1587-story.html
  |title=Phone Companies Combine Familiar Services for New Call
  |author=Elizabeth Douglas
  |date=August 19, 1999
  |access-date=September 22, 2022
  |archive-date=September 22, 2022
  |archive-url=https://web.archive.org/web/20220922170721/https://www.latimes.com/archives/la-xpm-1999-aug-19-fi-1587-story.html
  |url-status=live
  }}</ref> became known in some markets as '''call waiting ID''', or (when it was combined with call-disposition options) '''Call Waiting Deluxe'''; it is technically referred to as '''[[Analog Display Services Interface]]'''.  "Call Waiting Deluxe" is the Bellcore (now [[Telcordia Technologies]]) term for Type II caller ID with Disposition Options.

This class-based POTS-telephone calling feature works by combining the services of [[call waiting]] with caller ID<ref name=CWidLAT/> 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

* '''Switch''': Place the current call on hold to take the second call (not a new feature)
* '''Hang-up''': Disconnect the current call and take the second call (not a new feature)
* '''Please Hold''': Send the caller either a custom or telephone-company-generated voice message asking the caller to hold
* '''Forward to Voice Mail''': Send the incoming caller to the recipient’s [[voice mail]] service.
* '''Join''': Add the incoming caller to the existing conversation.

                 data            checksum
     digit     d1  d2  d3  d4  s1  s2  s3  s4
       1        1   0   0   0   1   1   1   1
       2        0   1   0   0   0   1   1   1
       3        1   1   0   0   1   0   1   1
       4        0   0   1   0   0   0   1   1
       5        1   0   1   0   1   1   0   1
       6        0   1   1   0   0   1   0   1
       7        1   1   1   0   1   0   0   1
       8        0   0   0   1   0   0   0   1
       9        1   0   0   1   1   1   1   0
       0        0   1   0   1   0   1   1   0
       *        1   1   0   1   1   0   1   0
       #        0   0   1   1   0   0   1   0
       A        1   0   1   1   1   1   0   0
       B        0   1   1   1   0   1   0   0
       C        1   1   1   1   1   0   0   0
       D        0   0   0   0   0   0   0   0

          FSK mark= 1200&nbsp;Hz   space= 2200&nbsp;Hz     1200 bpsk

The above flexibility requires the immediate presence of both a phone and a display screen, not one "several rooms away" from the other.<ref name=CWidLAT/> By 2007, Verizon and AT&T had bundled these services with still others, including speed dialling, "free" inside wiring maintenance, and unlimited minutes. The result was increased monthly spending for those customers adding features, but reduced individual charges
for those options they already had.<ref name=More4MoreLAT2007>{{cite news |newspaper=[[The Los Angeles Times]] |url=https://www.latimes.com/archives/la-xpm-2007-jul-17-fi-phone17-story.html |title=AT&T; raises rates on features |author=James S. Granelli |date=July 17, 2007 |access-date=September 22, 2022 |archive-date=September 22, 2022 |archive-url=https://web.archive.org/web/20220922182430/https://www.latimes.com/archives/la-xpm-2007-jul-17-fi-phone17-story.html |url-status=live }}</ref>