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| devolución de llamada (A feature that transfers a call back to the person who parked it, after a specified amount of time, so a caller doesn't remain on hold indefinitely) | |||
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ringback : 5 do fraz, 3 tematyki |
| Komunikacja | 1 |
| Technologia informacyjna | 3 |
| Telekomunikacja | 1 |