DIN ETS 300183 : 1993
DIN ETS 300183 : 19931472474
DIN ETS 300183 : 1993
Title: Integrated Services Digital Network (ISDN); conference call, add-on (CONF) supplementary service; service description; English version ETS 300183:1992
Year: 1993
Publisher: DIN Media GmbH
Availability: Within 1-2 working days
Title: Integrated Services Digital Network (ISDN); conference call, add-on (CONF) supplementary service; service description; English version ETS 300183:1992
Year: 1993
Publisher: DIN Media GmbH
Availability: Within 1-2 working days
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