Hi,
I am a programmer plus VoIP, telecom, and Linux expert from Pakistan. regarding your requirement I suggest the ICTBroadcast. we will install ICTBroadcast on your system and will configure it with PSTN, GSM Gateway, or VoIP provider of your choice.
Further, you can integrate CRM with ICTBroadcast use popup windows on incoming or outgoing calls.
Please contact me, to discuss this and proceed.
Regards