Standards Based Development

Naming JavaScript Files with dots (.) in Chrome

Upon viewing calltotel.user.js I saw the following screen in Chrome:

I'm assuming it was because of the dot operator (".") in the JavaScript file name, because the issue was resolved after resaving the file named calltotell-user.js, Chrome showed me this:

Call To uri Scheme

urls for Telephony Examples

The following url instructs the user agent to place a voice call to the specified number in Finland.

callto:+358-55-1234567

The following url instructs the user agent to place a fax call to the specified number:

callto:+358-55-1234567;type=fax

The following url instructs the user agent to place a data call to the specified number. The user agent may opt to use either a ITU-T V.34 modem (or a slower one, which is compatible with V.34), using settings of 7 data bits, even parity and one stop bit, or an ISDN connection using ITU-T V.110 protocol.

callto:+358-55-1234567;type=data;params=v34?7e1;params=v110

The following url instructs the user agent to place a voice call to +358-55-1234567, then wait two seconds and emit two DMTF dialing tones "2" on the line (for example, to choose a particular extension number). (Most Hayes AT compatible modems accept commas "," as the pause characters.)

callto:+358-55-1234567pp22

urls for Telephone Calls

The CallTo url syntax, introduced in NetMeeting 3, allows the specification of an extensible address for all forms of NetMeeting calls from your web page. CallTo urls are not case sensitive and can be up to 512 bytes long. Calls can be placed in these ways:

• Directly by host Name of ip address
• Through a directory server
• Through a gateway
• Through a gatekeeper

CallTo url Syntax

Direct Connect uri Scheme

The Direct Connect Scheme can be used to make radio calls. iden networks allow the launching of calls using the Direct Connect url scheme. dc:scheme is compatible with BlackBerry iden devices.

<a href="dc:5040*0077">Ping Albert</a>

Click to Call Links for Mobile Browsers

Facetime uri Scheme

facetime: uri launches the Facetime videochat application (iOS 4.1 and up). The example below will launch Facetime and connect to the given number:

<a href="facetime://5555555555">Call us free using Facetime!</a>

Click to Call Links for Mobile Browsers

Skype uri Scheme

skype:uri will launch the Skype application. The example below will launch and connect to the given user:

<a href="skype:skype_user?call">Call us using Skype!</a>

Click to Call Links for Mobile Browsers

Tel uri Scheme

The uri scheme "tel" describes resources identifed by telephone numbers. tel:scheme was actually copied from the Japanese i-Mode standard. tel: uri-scheme is supported by most mobile devices; upon activation, the user will receive a confirmation alert to place the outgoing call (to prevent black design patterns). The example below uses the international format: (+) (country code) (local area code) (local number), like so:

<a href="tel:+1800229933">Call us free!<a/a>

Note: in mobile devices that do not have a phone (iPod Touch, iPad, etc.), activating a link using the tel:scheme should trigger a prompt indicating actions (Create New Contact, Add Existing Contact, etc).

Click to Call Links for Mobile Browsers, The tel uri for Telephone Numbers

tel-av uri Scheme

tel-av: scheme upon activation, dials the supplied videophone number.

i&45;mode html

The following list is particular to tel-av: scheme when using i-mode :

• If there is no videophone number designated, the a element will not display.
• Videophone numbers text strings have a maximum of 26 digits.
• tel-av: scheme only works on supported videophone models.

Demo

<div class="demobox">
  <h2>Inquires</h2>
  <h3><a href="tel:0120800000">Mobile Phone</a></h3>
  <h3><a href="tel-av:03XXXXXXXX">Videophone</a></h3>
</div>

a (tel-av:scheme)

wtai uri Scheme

wtai:uri is an alternate method of activating calls. wtai:uri was created for contacting public libraries; not as supported as tel:uri; Does not work in Mobile Safari or webOS.

<a href="wtai://wp/mc;+1800229933">Call Me via wtai!</a>

Click to Call Links for Mobile Browsers

Official iana#45;registered schemes

Unofficial but common URI schemes

Official IANA-registered uri Schemes

The official URI schemes registered with the IANA are as follows (note that "IETF Draft" in no way is a finalized specification and must not be treated so; refer to Section 2.2 of RFC 2026 for more details):

Unofficial IANA-registered uri Schemes

irc://<host>[:<port>]/[<channel>[?<channel_password>]]

app:/ and app-storage:/ Schemas

app:/ and app-storage:/ Adobe air Proprietary uri Schemas (2008).

"Adobe AIR for JavaScript Developers Pocket Guide", Mike Chambers, Daniel Dura, Dragos Georgita, and Kevin Hoyt, 2008