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in stockReleased: 1992-12
DIN ETS 300139
Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992
ISDN; Dienstmerkmal Halten; Dienstbeschreibung; Englische Fassung ETS 300139:1992
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English PDF
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47.61 EUR
English Hardcopy
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47.61 EUR
| Status: | Standard |
| Released: | 1992-12 |
| Standard number: | DIN ETS 300139 |
| Pages: | 18 |
| Language: | English |
| Name: | Integrated Services Digital Network (ISDN); Call Hold (HOLD) supplementary service; service description; english version ETS 300139:1992 |
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