<div>
No other answers and this should be the solution.
</div>


<div>
<div class="content wysiwyg-content">
Can I block incoming calls to specific DNs? &nbsp;I know I can control the out going but not sure how to handle incoming. &nbsp;For example I have a range of DIDs 0200-0299 that CUBE will forward to CUCM, but perhaps I don't want 0211 and 0232 getting external calls.<br />
<br />
My flow is as follows: ITSP---SIP---CUBE---SIP---<wbr />CUCM---IP Phone
</div>
</div>


Can I block incoming calls to specific DNs?  I know I can control the out going but not sure how to handle incoming.  For example I have a range of DIDs 0200-0299 that CUBE will forward to CUCM, but perhaps I don't want 0211 and 0232 getting external calls.

My flow is as follows: ITSP---SIP---CUBE---SIP---CUCM---IP Phone

Restricting Inbound Calls to Call Manager 11.x CUCM

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).

Voice Over IP

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

IP Telephony

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).