We have an issue with calls being lost when they are put on hold from a hunt group that only has IP telephones. We have a IP500 with 4 VCM channels. When calls come into our departments hunt group (this hunt group has 2 IP telephones in it and our whole system only has 3 IP telephones)and when they put a call on hold, they can no longer pick them back up - looks like the call is lost. According to the caller, they were left still on hold but we had no way of getting them back. This has happened numerous times. When calls come into this hunt group - they are instantly placed into a queue where there is an announcement (using VM Pro) that is played until the call can be answered. Whenever I see this issue happening and I logon to VM Pro - it is complaining about not having enough VCM's sometimes hundereds of times where there were not enough VCM's available. I guess I am confused about whether or not this is truly at VCM issue. Do I not have enough VCM's for 3 phones? Perhaps it is the fact that we only have a few VCM's and by queueing calls it is taking more VCM's (when I put the call on hold). For example, maybe the issue is happening when both phones are in use and I put one call on hold and attempt to answer another queued call? I am confused about this issue and it does not happen all the time. The third IP phone is rarely used. I want to make sure that my configuration (using queuing, IP telephones, & 4VCM's) is not the culprit but I am not sure how VCM's are used in conjunction with VM Pro (when a call is in Queue, or put on hold, etc...) As I mentioned, when the call is on hold, you can no longer see the call on hold on the ip phone and have no means with which to pick the caller back up.