(4) Revenues

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in TEUR

2014

2013

Services

3,673,851

3,852,555

Equipment

344,113

331,394

Operating revenues

4,017,964

4,183,949

For information on the change in accounting estimate of revenues due to the implementation of a new billing system interface, see Note (9).

The following table sets out revenues from external customers for each product line:

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in TEUR

2014

2013

Monthly fee and traffic

2,939,940

3,021,376

Data and ICT Solutions

222,507

225,462

Wholesale (incl. Roaming)

168,567

167,744

Interconnection

315,253

408,823

Equipment

344,113

331,394

Other revenues

27,584

29,150

Total revenues

4,017,964

4,183,949

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