Telephony hardware apparatuses, namely, digital music on hold players for providing audio messages to callers put on hold, announcers for Wake-up calls for hotels, for automatic call distribution (ACD) and uniform call distribution (UCD) announcements, change of addresses and other telephony announcement, auto attendants for answering multiple calls and allowing the caller to reach the desired extension, voice mails apparatus, namely, an answering machine, call accounting systems comprising t...