One needs to remove the trailing '#' from the key to make this work

The problem with "a" is, that you would need to find the section 
number while the phone field is rendered. You would actually need some 
code that list all form variables from the form that currently being 
rendered, find the currently rendered variable there, and then save 
the section where it has been found.

For b you can use the "section" URL parameter, e.g. 
horde/turba/contact.php?source=xxx&key=yyy&section=2

In short: a possibility for the telephony/dial service to return the 
user to the page and section he came from is requested.

In long: Turba makes use of the telephony/dial service to render a 
telephone number as URL that points to the dialling service. The link 
is put together by the dialler. When the link is clicked, after the 
dialler did what he did, the user's browser is returned to the "last" 
page, which is the Turba contact page. However, this turba page has 
several sections (or tabs). The user will alway end up in section #1, 
which may be inconvenient.

To fix this, (a) the active section should be retrievable in the first 
place and (b) there must be a way to direct a browser to that section 
on turba's contacts page.