How to set Phone number with extension in iPhone Webapp?

IN a webapp, if I put down a number as below:

<a href="tel:888-123-4567">call now</a>

iPhone will turn that link into an instant call function when click. However, if I have extension, e.g. 1-888-123-4567 ext 009 (just one level of extension). what should I do?

Solution

You actually use a "pause" which is represented by ',' character.

<a href="tel:888-123-4567,009">call now</a>

This will dial the number, wait for the call to be connected and then dial the extension number.