Obviously, your recorder must support input via a 3.5mm microphone jack, such as the highly rated Sony ICD-UX570. It has almost 27 hours of battery life, records to MP3 (storing 159 hours worth in 4GB of memory), supports microSD cards, and includes a pop-out USB connector for charging and transferring data to a PC.
Your voicemail greeting can make a positive or negative impression on people. By considering your target audience and tone, you should be able to keep it positive. Length: Don’t make people wait minutes to leave a message. Apologies: If people expect your to be available, apologize for missing their call. Set expectations: Let people know when they may receive a callback, but be realistic. Accuracy: If you change your voicemail for things like holidays, be sure to update it when needed. How do You Set Up a Business Voicemail?

When you're in a call, wait for the Add Call button to light up, so you can add a third caller via 3-way calling. Tell the other person to wait, click the button, and call yourself. Stay on the line and listen to your own voice mail greeting, then for the tone that indicates recording has begun. Tap Merge Calls. All three calls are merged—and the third one (your voice mail) is taping the other two.
11. "Hi, you've reached [company]. Unfortunately, we're currently unavailable. But we want to talk to you — so please leave your name and number, as well as your reason for calling, and someone will call back ASAP."