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Distributed Communications System B Private Networking A given station is called using the same 5-digit extension regardless of where in the ETN the call originates. Three switches are included in the example. Each has been assigned a list of RNX and UDP codes. See Figure 7. SWITCH RNX UDP CODE A 224 41 C 223 51 C 223 52 B 222 60 B 222 61 Figure 7. UDP Example 1 2 4 5 6 3 7 1. Switch A Dial Plan for extensions is 41XXX RNX=224 2. Switch B: Dial Plan for Extensions is 60XXX and 61XXX RNX=222 3. Switch C: Dial Plan for extensions is 51XXX and 52XXX RNX=223 8 4. Extension 41000 5. Extension 61234 6. Extension 60123 7. Extension 51234 8. Extension 5200 r764905 CJL 062296 352 Administration for Network Connectivity CID: 77730 555-233-504 — Issue 1 — April 2000
Distributed Communications System B Private Networking If a user at extension 41000 wants to call extension 61234, there are two choices: • Dial 61234 • Dial the AAR access code followed by 222-1234 If 61234 is dialed, the system recognizes 61 as a remote UDP, determines the associated RNX (222), and uses AAR to route the call to 222-1234. If the AAR access code and 222-1234 are dialed, the system finds the route pattern for RNX 222 and routes the call to the switch associated with that RNX. Whenever UDP is used to route a call to another switch, the correct digit deletion and insertion must be specified within the route pattern so that the receiving switch gets digits in the format it expects. DEFINITY ECS can be configured in several different ways. • If AAR is available on the receiving switch, Subnet Trunking can be used to insert the AAR feature access code on the originating switch or digit insertion may be used to insert it on the receiving switch. The receiving switch then uses AAR digit conversion to convert 222 with 7 digits to an extension by deleting 3 digits and inserting a 6. • If AAR is not available on the receiving switch, Subnet Trunking must be used on the originating switch to delete the 222 and insert the digit 6 at the beginning of the extension number so that the receiving switch can continue to route correctly. If the user at extension 51234 on Switch C dials extension 61234, the call must first go through Switch A before proceeding to Switch B. When 61234 is dialed, the system recognizes 61 as a UDP code, determines the associated RNX (222), and uses AAR to route the call. The AAR feature access code plus 222-1234 are outpulsed to Switch A. Switch A then recognizes the RNX 222 as a remote switch and routes the call to Switch B and extension 61234. This same type of call routing occurs when an extension at Switch B calls an extension at Switch C. If extension 61234 on Switch B calls extension 61235, the system recognizes 61 as a local UDP code and routes the call directly to extension 61235. Considerations • In North American network environments, extensions beginning with 0 may route to an attendant. You are encouraged to use another number as the leading digit when assigning extensions. • When you call an extension on another switch, there may be a slight delay before call-progress tones are applied. This delay is due to the trunk signaling necessary to complete the call to the remote switch. • When you select the option to look at the UDP table first, calls that might otherwise terminate at a local extension route over the network. This is easily reversed. When you remove the extensions from the UDP table, the local extension can be dialed again. Administration for Network Connectivity 555-233-504 — Issue 1 — April 2000 CID: 77730 353
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DEFINITY ® Enterprise Communicatio
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Contents Preface Purpose. . . . . .
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Contents Switch-Node 3 Administrati
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Contents QSIG . . . . . . . . . . .
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Preface This book describes how to
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Issue Status Preface ppp Data Modul
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Issue Status Preface Reorganization
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Terminology Preface Terminology The
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Tell us what you think Preface Tell
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Trademarks Preface Trademarks The f
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1 Networking Overview This chapter
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DEFINITY Switch Connectivity 1 Netw
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IP Softphones 1 Networking Overview
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IP Addressing 1 Networking Overview
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2 H.323 Trunks This chapter describ
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H.323 Trunk Administration 2 H.323
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Troubleshooting IP Solutions 2 H.32
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3 C-LAN Administration This chapter
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Overview 3 C-LAN Administration ✔
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Overview 3 C-LAN Administration TCP
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Overview 3 C-LAN Administration Int
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Configuration 1: R8r R8si 3 C-LAN
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Configuration 2: R7r (+CMS) R7csi
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Configuration 3: R8si R8r Gateway
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Configuration 5A: R8csi R8r (one C
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Overview 4 Networking Example Task
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Network Map 4 Networking Example Ne
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Switch-Node 1 Administration 4 Netw
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Intuity Translations for DCS AUDIX
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A Screens Reference This appendix g
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Networking Screens A Screens Refere
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Other Networking-Related DEFINITY S
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Page 321 and 322: Other Networking-Related DEFINITY S
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C Security Issues This Appendix bri
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Network Security Issues C Security
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D Capacities and Performance This A
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D Capacities and Performance Perfor
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D Capacities and Performance Number
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E C-LAN Installation This chapter p
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E C-LAN Installation Install C-LAN
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F IP Trunk Installation and Adminis
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IP Trunk Administration F IP Trunk
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Procedures for Extension Dialing Be
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DCS over IP Trunk F IP Trunk Instal
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G References This Appendix lists th
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G References Installation and maint
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G References CentreVu CMS The follo
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Glossary A AAR See Automatic Altern
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B8ZS Glossary B B8ZS See Bipolar 8
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Call Management System (CMS) Glossa
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COR Glossary COR See Class of Restr
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DID Glossary DID Direct Inward Dial
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facility Glossary F facility A tele
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interserver routing table Glossary
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link-access procedure on the D-chan
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NEMA Glossary NEMA National Electri
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PBX Glossary PBX Private Branch Exc
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outing plan Glossary routing plan R
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T-carrier Glossary T-carrier A hier
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virtual circuit (virtual connection
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Index A AAR and ARS features intera
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D Index Centralized Attendant Servi
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E Index E Distributed Communication
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L Index L ISDN Feature Plus feature
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R Index QSIG Call Transfer feature
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U Index U trunk access codes (TAC)
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