I apologize if this is long - we have a Verizon T1 for our ISP which has been at capacity for some time and we are planning on adding an additional 15mb/3mb for data with a separate 1.5mb to support a VoIP which would give us 3 external connections (once the contract with Verizon is up we will most likely drop them). We currently have a Cisco ASA 5510 without the Security Plus license that our T1 connects to as well as VPN clients. Internally we have a Cisco Express 500 that our VoIP phones connect to which is then connected to the ASA. Our data drops are connected to a “dumb” switch which is also connected to the ASA.
We were hoping to have Voice on the 1.5 cable, our Email and web servers on the T1 and all other data use the 15mb cable. From what I understand we cannot use the ASA 5510 for more than one ISP. We have 2 more Cisco Express 500s sitting in our closet. I know this is a stretch but with the equipment that we have, 3 Cisco Express 500s and a 1 Cisco ASA 5510, can we make this work to have multiple external ISPs? I’m not too familiar with networking so any help is much appreciated.