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(
www.vierling.de
)
Vierling offers a complete portfolio of GSM gateways and VoIP-GSM gateways: from one to 32 GSM channels and with ISDN, analog and VoIP interfaces.
Keywords:
GSM gateways, cellular gateways, fixed cellular terminals, voip-gsm gateways, ISDN, PRI, BRI, S0, VoIP, SIP, H.323, PBX, PABX, reduce costs, interconnection, interconnectivity, phone costs, SIM box, SIM boxes, SIM cards, mobile radio
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