So-called warning strike will be for a limited time under German labour law
The strike will take place on Tuesday and Wednesday, affecting customer services and technical support divisions, the union said on Monday.
The walkout is a so-called warning strike of limited duration, which under German labour law does not require a ballot.
As part of the wage negotiations, which has already seen limited strike action, Deutsche Telekom has offered to raise pay by 3 percent with no more increases for two years. Verdi wants a 5.5 percent increase and to renegotiate another rise in a year's time.
Verdi also wants Deutsche Telekom to refrain from mandatory layoffs. The new agreement would cover 72,000 Telekom employees in Germany, excluding staff at its IT services business T-Systems unit, which have their own labour contract.
Deutsche Telekom announced last year it plans to cut around 7.5 percent of jobs in the next three years at T-Systems, and media reports have suggested even more could be shed.
