The 2nd most famous communications company is AT&T, American Telephone and Telegraph.
[BT Group PLC is the most famous telecommunications company]

Looking at the annual report and financials some key information can be found.

[http://www.att.com/gen/investor-relations?pid=18777]

Revenues of $126.4 Billion = £78.9 Billion

What is very interesting is that break down.

19% on Voice
28% on Data
53% on Wireless

$20.4 Billion = £12.7 Billion  in capital expenditures & and spectrum purchase.
Paid out more than $10 Billion = £6.24 Billion in regular quarterly dividends
1,300 scientists and engineers at AT&T Labs

Key financials:

Total assets $272,315 Million = $272 Billion = £169 Billion
Total debt $ 69,844 Million = $69 Billion = £43.6 Billion
$4,868 Million held in cash and cash equivalents

Voice revenues decreased by 10.0%, in 2012 primarily due to declining demand for traditional voice services by our consumer and business customers.

Pension benefit obligation at end of year $58,911 million = £36.7 Billion
Fair value of plan assets at beginning of year $45,907 Million = £28.6 Billion
Unfunded status at end of year $13,851 million = £8.65 Billion

Yes, AT&T has a Pension Deficit.

Number of employees 241,810
106 Million Wireless Subscribers.

American Telephone and Telegraph, the North American Giant, like a lot of companies, the pension fund is deficit. In mature economies, the aging population and retired workers living longer are putting a financial strain on pension funds.