3 (.com) + 3 (.tel) = 18 possible .com pageviews:

All businesses, who have a .tel domain, won't only have a .tel.

They will be using their .tel to point to their .com.

.Tel is only the working donkey, who directs the clients to the .com website.

If you have got a .com, you can set up a few donkeys: "i-aaaaa, ii-aaaa-iii-aaaaa...": One donkey is good, three donkeys, are even better:

Example:

fruitdish.com
fruitdish.tel (donkey directing to fruitdish.com)
allsortsfruit.tel (donkey2 directing to fruitdish.com)
fruitland.tel (donkey3 directing to fruitdish.com)
.
:blink:
.
If you wanna be big biz:

Get:
allsortsfruit.com
fruitland.com

And teach your positioned donkeys to direct to those websites as well (by adding them to your .tel's)
.
Conclusion:
If you got a few biz websites, get a few .tel's, and direct-direct (matching domain names), and cross-direct to your .com's (non-matching domain names).
.
If you where able to follow me: Here is another szenario:

Ok:
You have the tree (.com)'s, as well as the three (.tel)'s, and can do:

3 times direct-direct to .com's.
2 times cross-direct
antother 2 times cross-direct
and anoter 2 times cross-direct

That is pointing to three .com's: 9 times. By using three tel's.

Anyway:
You can set up more pointers:
How?:

Put a "Contact Us" .tel page, on each .com website:

This way, you simply repeat the szenario:
3 times direct-direct to .com's.
2 times cross-direct
antother 2 times cross-direct
and anoter 2 times cross-direct

And get totally 18 pointers to your three .com websites.

Take away 3 self pointers, and you got 15 useful pointers.

Conclusion:
By using "Contact Us" .tel pages, you can double your number of pointer links.
.
Recapitulation:
To get 15 pointer links, you have:

3 .com websites
3 .tel webpages
3. "Contact Us" .tel pages on the three existing websites.

Which give you: 3 direct hits, and 15 indirect pointer hits to .com websites, and a total of 18 posibilities to click on your 3 .com domains (here, you have 6 domains and 18 possibilities to get a click to one of your 3 .com websites.).

Without 3 .tel domains, you would only get 3 direct hits, instead of 18 hits to your 3 .com domains.