While phones and other devices are getting better all the time, there are frequently problems with audio recorded on low-quality equipment. Static pops, grainy voice quality, and background noise interference are all common with audio recorded on non-professional equipment.
When recording a personalized voicemail greeting on your office phone, your greeting should include only the company name and your extension number. When recording a personalized voicemail greeting on your office phone, your greeting should include only the company name and your extension number. State your name and spell it out if you’re asking callers to follow up with written correspondence. State your company name and department name. Let callers know that you cannot take their call right now. Invite them to leave a message. What should I record on my work voicemail?

Example: 'Thank you for calling [insert name here]. We're sorry we couldn't take your call this time. However, if you'd like to leave us a voicemail we will get back to you within [for example] 30 minutes of receiving this message. Alternatively, if you'd like to reach out by email you can do so at [insert email address]. Again, thank you for calling [insert company name]. We look forward to your message.'
These issues limit the quality of the recording because the amateur actor doesn’t know how to speak with the proper enunciation and cadence for phone system recordings, and there’s no experienced director handy to provide guidance.