"There really wasn't a limitation on 'Am I going to be able to talk to you if we have different technology platforms?' There isn't a limitation on our ability to go ahead and [offer] that as an alternative." However, a Polycom spokeswomen at the San Francisco video conference site said IT staffers might need to make a few adjustments to make a Polycom and a Cisco system work on the same videoconference call. However, Polycom is a founding member of the Open Visual Communications Consortium, an industry group devoted to further improving interoperability between various network service providers. Vendors and observers of the burgeoning video conferencing and collaboration market talk frequently about the need for interoperability and compare it to the cellular phone business, where subscribers to AT&T, Verizon, T-Mobile, or Sprint can all place calls to each other.