|In CHF million, except where indicated||2017||2016||Change|
|IT, Network & Infrastructure||167||173||–3.5%|
|Other Operating Segments||850||789||7.7%|
|Revenue from external customers||11,662||11,643||0.2%|
|Operating income before depreciation and amortisation (EBITDA)|
|IT, Network & Infrastructure||(1,290)||(1,262)||2.2%|
|Other Operating Segments||180||164||9.8%|
|Reconciliation item pension cost 2||(92)||(72)||27.8%|
|Operating income before depreciation and amortisation (EBITDA)||4,295||4,293||0.0%|
1 Including intersegment settlements of services performed by other network providers.
2 Operating income of segments includes ordinary employer contributions as pension fund expense. The difference to the pension cost according to IAS 19 is recognised as a reconciliation item.
Segment expenses comprise direct costs, personnel expenses and other operating costs less capitalised costs of self-constructed assets and other income. Segment expense includes ordinary employer contributions as pension fund expense. Under IAS 19, the difference between the ordinary employer contributions and the past service cost is reported as a reconciliation item between the operating incomes of the segments and Group operating income.