3. Use a male-to-male headphone cable (that is, one with connectors at both ends) to connect your phone to your computer’s “Line In” jack. That cable shouldn’t run you more than a few bucks. Note that some computers, particularly Macs, only have one audio port that serves as both input and output.
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?

Techjunkie.com One sign that your phone calls are being ignored is how many rings before it goes to voicemail. Generally, the feedback ringtone will go through several cycles before the voicemail message comes up. If upon placing the phone call, it rings only once or twice and goes to voicemail then your calls are probably being declined. 443 is also the number to dial to retrieve voicemails. To switch voicemail off dial 1626. Voicemail deducts one minute from your Goodybag regardless of length of call (assuming you have minutes left) or, if not, costs 8p per call.
When your phone only rings once then cuts out, this fault is known as "ring trip". It can be caused by a number of things either inside or outside your property, and will require a process of elimination to track down the cause of the fault.