Aastra 6773 User Guide Aastra 6770/6770ip for OpenCom 1000 - Page 35
Fig. left: Key extension Aastra M671/KeyExtension 73P, OpenPhone 75/75 IP
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Aastra 677x (OpenPhone 7x) System Telephones Key extensions The following equipment combinations are possible: Key extension ... Aastra M671/ KeyExtension 73P Aastra M676/ KeyExtension 75D ... with the features connectable to system telephone - 36 keys with LED indicator - Labelling on label strips - Aastra 6773/6773ip - OpenPhone 73/73 IP - Aastra 6775/6775ip - OpenPhone 75/75 IP - 20 keys with LED indicator - Aastra 6775/6775ip - 3 keys with LED indicator to - OpenPhone 75/75 IP shift levels; enables the programming of 60 storage locations on each key extension - Labelling of the keys over the display; each key is assigned to a display line Level keys Fig. left: Key extension Aastra M671/KeyExtension 73P; Fig. right: Key extension Aastra M676/KeyExtension 75D 33