Steiger A. Elektro AG

Teleinformatik Services AG

8050 Zürich

ATELIER TELE SERVICE

1018 Lausanne

Tel-Team Service GmbH

4132 Muttenz

Global Telecommunication Service GmbH

3400 Burgdorf

Telematik-Service GmbH

8280 Kreuzlingen

TelCommunication Services AG

8050 Zürich

Telecom Services SA

2854 Bassecourt

Telecom Services SA

2300 La Chaux-de-Fonds

Telecom Services SA

1752 Villars-sur-Glâne

Tele-Check Service AG

8002 Zürich

GSM - Services Téléphone Mobile

2503 Biel

Telecom Services SA

1004 Lausanne

Telecom Services SA

1004 Lausanne

Tellini Facility Services GmbH

6032 Emmen

z-telecom services gmbh

8614 Bertschikon (Gossau ZH)