If you are located in Australia and want to use VOIP integrated with ZOHO CRM you have probably found options are very limited. I have used MAXOTEL for many years as my hosted VOIP provider and today I submitted a Feature request on the Maxotel site. If you are a MAXOTEL user and would like to see a Telephony integration with ZOHO CRM please vote on my feature request:
https://my.maxo.com.au/#!/featureforum/request/128. TIA Tony