Question

6

I'm writing an iPhone application which needs to have an option to call our office. However, the phone number that needs to be dialed has a 5 digit extension.

I know that to call a regular phone number we can use openURL using something like:

[[UIApplication sharedApplication] 
    openURL:[NSURL URLWithString:@"tel:1-800-555-5555"]];

Can I get this to work with an extension? If so, how?

The Apple docs link to RFC 2806, which describes the URL scheme for tel: and it seems as though extensions are supported, but I can't figure out the syntax from the RFC.

Cœur

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asked Dec 9, 2009 at 16:04

1

Answer 1 · 2011-05-05T18:23:08.537Z+00:00

9

Not 100% sure if this is the answer, but from the RFC you linked on page 14:

tel:+358-555-1234567;postd=pp22
The above URL instructs the local entity to place a voice call to +358-555-1234567, then wait for an implementation-dependent time (for example, two seconds) and emit two DTMF dialing tones "2" on the line (for example, to choose a particular extension number, or to invoke a particular service).

Hope this helps.

answered Dec 9, 2009 at 16:09

2 Comments

I tried it and didn't need the postd. I just put the phone number @"800-555-5555;pp1" and it worked like a charm. Thanks Topher!

2011-05-05T18:23:08.537Z+00:00

I just tried and it wouldn't work with the semicolon! @"+1-800-555-5555p1" worked for me though.

2012-07-31T23:23:06.563Z+00:00

Answer 2

2

If it is a phone system where you dial the main number, hear a prompt and then enter the extension number then you can include a pause in your number to allow for the call to be picked up. Per the RFC 2806 that you linked to this is done using a "p" pause character for each 1 second pause.

answered Dec 9, 2009 at 16:10

mikej

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