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158Appendix B Understanding Telephony Routing and Translations

•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..

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+7 digits to reach xyz.com from abc.com

 

 

all_dial_plans

6+7 digits to reach abc.com from xyz.com

 

 

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.

NN10043-113

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Nortel Networks NN10043-113 manual Telephony route provisioning scenario and examples, Associating COS and the route
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NN10043-113 specifications

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