You also need to enable the Remote Call
Control feature for each OCS user and confi gure each client to be able to take advantage of
the phone system integration.
Remote Call Control is a good option for customers who aren??™t yet ready or willing to
make phone calls using a software-based phone. RCC provides an easy way for users to look
up contacts??™ phone numbers and make calls all from one single interface.
Solutions Fast Track
Using a Gateway
?› Integrating with a PBX allows you to extend the functionality of your phone
system to OCS.
?› PBXs that don??™t have IP capability can now support remote users who use the
Communicator client.
?› PSTN integration to OCS gives users the ability to call anyone, anywhere, anytime.
?› Use a gateway to enable OCS clients to make calls to users on other phone
systems.
?› Gateways translate between OCS and a PBX/PSTN connection.
?› Even if your PBX supports SIP, you need a gateway.
CSTA/SIP Gateways
?› CSTA/SIP gateways allow you to enable Remote Call Control.
?› CSTA/SIP gateways let OCS users see the status of your IP phone.
?› There are no supported CSTA/SIP gateways just yet.
Integration with PBX and IP-PBX Systems ??? Chapter 9 313
Frequently Asked Questions
Q: Do I need a gateway to enable PC-to-PC calls with OCS?
A: No. By default, OCS users can make PC-to-PC calls.
Q: Do I need a gateway to make calls to the PSTN?
A: Yes. OCS requires a gateway to translate between SIP and the PBX or PSTN.
Q: My PBX supports SIP.
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