UPDATE 2017-3-6: All ESLPod.com links changed to Lizhi.fm. For more info, see this post: ESLPod Links Broken.
Update 2016-5-22: Added several more BEP podcasts and 1 more ESLpodcast.
In our course on Business Communication, we have a class on telephoning, with topics like answering the phone, leaving/taking messages, setting up & changing appointment, making/respondng to complaints etc.
Here are some useful ESL podcasts you can listen to about making business phone calls.
ESL Pod has lots of useful podcasts for intermediate & upper-intermediate learners. Usually a short conversation followed by explanation of the words, idioms & ideas; followed by the conversation again at normal speed for native English speakers.
Business English Pod (BEP)
Business English Pod has many podcasts for learning business English, some for advanced learners, some for intermediate learners.
The audio is free. For some podcasts, you have to pay for other resources, but others might have free resources like "Quiz & Vocab".
More Telephone English
I also have a few more links for telephone English here on my website, mostly shorter exercises for beginner and intermediate levels.
G.A.L.E.S.L. / joe3
Some tips and links on learning English.