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crumpled paper with the inscription isdn and modern telephone with voip in the display as a sign of the change from isdn to voice
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JPG 300 DPI
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Author:
dreamstime
License:
buy for Personal Use & Commercial
File Type:
JPG
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business
cellphone
communication
data
development
digital
digitization
economy
fast
internet
isdn
mobile
modern
network
office
operator
over
privacy
provider
security
smartphone
success
support
technology
telephone
telephony
transmission
voice
voip