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158 Appendix B Understanding Telephony Routing and Translations
NN10043-113
[Standard - Nortel Networks Confidential]
• The 5+4 digit dial plan allows the subscribers in subdomain rich.abc.com to
reach other subscribers in the same subdomain using only 5 digit dial plan (for
example, 5+1000). Since the 5 digit dial plan is only required in the
subdomain, it is assigned as a private route.
• The 9+10 digit dial plan is used to access the SIP PRI Gateway to terminate
calls to a PSTN network, so this is assigned a gateway route.
• The 6+7 digit dial plan is used for communicating between two parent
domains, therefore this digit range is assigned to SIP routes.
Associating COS and the route
The COS and routes described earlier in this section are tied together to provide
the user restrictions in the following table (Table 25). This table shows that the
lobby_dial_plan COS will only have access to the 5+4 digit dialing, therefore,
restricting phones in a lobby to only 5 digit dialing only. The company_dial_plan,
having the highest COS, will have access to all three routes.
.
Telephony route provisioning scenario and examples
The steps in this section provide a scenario and sequence to follow when using the
sample dial plan to provision telephony routing.
Table 25 Association between COS and Routes
COS Routes
lobby_dial_plan 5+4 digit to reach subscribers in rich.abc.com
local_dial_plan 5+4 digit to reach subscribers in rich.abc.com
9+10 digits to reach a PSTN subscriber. Strip the 9 before
reaching the subscriber
company_dial_plan 5+4 digit to reach subscribers in rich.abc.com
9+10 digits to reach a PSTN subscriber. Strip the 9 before
reaching the subscriber
6+7digitstoreachxyz.com from abc.com
all_dial_plans 6+7 digits to reach abc.com from xyz.com
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