Nortel Networks NN43001-314 - Manual (Page 388)

388 Appendix C On-net dialing plan configuration examples
From main office to Branch Office
In this scenario, the following occurs:
• DN 3001 or 3002 dials DN "65043101" (a digital telephone in the Branch
Office).
• The main office Call Server recognizes the digit "6" as AC1 and the
digits "504" as LOC. It accesses the associated RLI and uses the
defined Virtual Route and Virtual Trunk.
• The NRS is queried for the destination node IP address with which to
route the call over the Virtual Trunk. Because "504" is registered to the
Branch Office, the Branch Office node IP address is returned for "ESN
504 3101".
• The MG 1000B Core terminates the incoming Virtual Trunk call to DN
3101, since "504" matches the HLOC of the Branch Office.
• The Voice Gateway channel in the Branch Office provides IP-TDM
transcoding.
From Branch Office to main office
In this scenario, the following occurs:
• DN 3101 dials DN "65013001" (or "65013002").
• The MG 1000B Core recognizes the first digit "6" as AC1. It accesses
the RLI appropriate for the LOC of "501" and uses the Virtual Trunk
specified for that route.
• The NRS is queried for a destination node IP address with which to
route the call over the Virtual Trunk. Because "501" is registered to the
main office, the main office node IP address is returned.
• The main office Call Server terminates the incoming Virtual Trunk call to
DN 3001 (or 3002) because "501" matches the HLOC of the main office.
• The Voice Gateway channel in the Branch Office provides IP-TDM
transcoding.
When the Branch User telephone is in Local Mode
In this scenario, the following occurs:
• The MG 1000B Core handles the call processing of DN 3002.
• If no network outage or Signaling Server/NRS failure occurs, DN 3002
can still make and receive a call to or from any telephone in the Branch
Office or main office using UDP.
• However, dialed in/out digits are different from those used in Normal
Mode because the LOC is changed. For example:
— DN 3001 can call DN 3002 by dialing "65043002", instead of the
"3002" dialed in Normal Mode.
Nortel Communication Server 1000
Branch Office Installation and Commissioning
NN43001-314 01.02 Standard
Release 5.0 20 June 2007
Copyright © 2007, Nortel Networks
.