From English - German Ding/FreeDict dictionary ver. 1.9-fd1: call back on no reply /kˈɔːl bˈak ˌɒn nˈəʊ ɹɪplˈaɪ/ (CCNR /sˌiːsˌiːˌɛnˈɑː/) Rückruf bei Nichtmelden see: callback, ring back, callbacks, rings back, automatic callback, automatic call back on busy, completion of calls to busy subscriber, He asked to be called back., Thank you for calling back.
call back on no reply /kˈɔːl bˈak ˌɒn nˈəʊ ɹɪplˈaɪ/ (CCNR /sˌiːsˌiːˌɛnˈɑː/) Rückruf bei Nichtmelden see: callback, ring back, callbacks, rings back, automatic callback, automatic call back on busy, completion of calls to busy subscriber, He asked to be called back., Thank you for calling back.