Telephone
Teleinformatik Services AG
8050 Zurich
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
Telecom Services SA
2854 Bassecourt
2300 La Chaux-de-Fonds
1752 Villars-sur-Glâne
Tele-Check Service AG
8002 Zurich
GSM - Services Téléphone Mobile
2503 Biel
1004 Lausanne
Tellini Facility Services GmbH
6032 Emmen
z-telecom services gmbh
8614 Bertschikon (Gossau ZH)
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