Vendors -- VoIP for the call center

Use this section to browse vendors for VoIP in the call center.

Editors' note: This reference tool is not meant to provide a comprehensive list of all the vendors in this space. We've provided these vendors to give you a starting point from which to begin your research.

If you're a CRM practitioner in the evaluation stage of a VoIP project, use this fast reference tool to get started with vendor research.

Session Initiation Protocol (SIP) is the key to choosing your VoIP vendor for the call center, says Donna Fluss, principal of DMG Consulting LLC.

"Most [call center] vendors are now offering a VoIP solution," Fluss said. "SIP is where there are significant differences. That is the differentiator."

So, before we go any further, what is SIP? Learn more here.

If you're ready to research, start with the list of vendors below.

Some vendors with on-premise offerings
(Listed alphabetically)

* Alcatel
* Aspect Software, Inc.
Avaya Inc.
* Cisco Systems, Inc.
* CosmoCom, Inc.
* Genesys Telecommunications Laboratories, Inc
* Interactive Intelligence Inc.
* Nortel Networks
* Nuasis Corporation
* Siemens AG

Some vendors with hosted offerings
(Listed alphabetically)

Contactual, Inc.
* Five9, Inc.
* Telephony@Work, Inc.
* UCN, Inc.

To continue your research, head back to's All-in-One Guide: VoIP in the call center


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