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IP Telephony at Ohio State

IP Telephony at Ohio State. “And Beyond”. Harpal Chohan Russell Morrison. Enterprise Networking - The Ohio State University. What, Where, and How?. Our deployment Numbers, plans, and other stuff Reaching out - Linking with other Installations Routing Calls between Peers What next?.

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IP Telephony at Ohio State

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  1. IP Telephony at Ohio State “And Beyond” Harpal Chohan Russell Morrison Enterprise Networking - The Ohio State University

  2. What, Where, and How? • Our deployment • Numbers, plans, and other stuff • Reaching out - Linking with other Installations • Routing Calls between Peers • What next?

  3. PSTN PSTN Local Deployment Architecture OSU Call Manager PRI - T1 OARnet Call Manager Gateway OSU Network OARnet Backup Call Manager PRI - T1

  4. 2-xxxx 3-xxxx 4-xxxx 5-xxxx 6-xxxx 8-xxxx 9-xxx-xxxx 9-1-(x…x) 1-code-(x…x) 9-1-800-??? 911 ??? Local Dial Plans Outgoing “Legacy” Calls ip-phone to ip-phone • 7-xxxx On Campus Off Campus Incoming “Legacy” Calls • 827-xxxx Outgoing “Caller Id. • Prepend 614 82 • Send 614 827 xxxx

  5. Local Preferences and Issues • DHCP for phone address - specify “tftp” • Distributed DHCP Servers • Protect Call Manager • Autoregistration off - Pre-assign phone no. • Distributed departmental firewalls

  6. PSTN PSTN Internet-2 Test Bed Collaborations OSU Call Manager Gateway Harvard Call Manager Harvard OSU Abilene STAR TAP Call Manager SURFnet ??? ??? Netherlands Additional members

  7. PSTN PSTN Dial Plans Between Call Managers OSU CM NNX 614 827-xxxx Harvard H.323 Abilene Gateway 614 292-xxxx 614 293-xxxx 614 688-xxxx 614 247-xxxx 614 004-xxxx Plus Code LD 614 292-xxxx 614 293-xxxx 614 688-xxxx 614 247-xxxx 614 004-xxxx Plus Code LD 617 384-53xx 617 384-54xx 617 ???

  8. PSTN PSTN Routing over the H.323 Gateway H.323 OSU Network Harvard Network Gateway Gateway NANP Outbound NANP Outbound

  9. Open Issues • NANP Routing standardization between Call Managers • Acceptable usage policies between Call Managers • A). Business • B). Personal • Sharing of T-1 and Trunk Gateways between Call Managers • Expectations of institutions wanting to participate in H.323 pilot

  10. What Next? • Additional Abilene Participants • Voice Mail • Conference Bridging • Integrated Messaging • Directory Services • Next Generation Phones - XML etc.?

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