How to I get a lead vendors info to push into crm?

How to I get a lead vendors info to push into crm?

We have a call center and use several lead companies that get all of the clients info and when they call into our center to transfer the client all of the information with our old crm would be able to be pulled in the crm so the clients info was there without us asking to do it again.  How can I get it so i can pull the lead in zoho?