Cisco GRP Manual de usuario descargar pdf (Pagina 31)

call, you must use the command forward-digits 4, or forward-digits all, so that the

appropriate number of digits are forwarded. To restore the forward-digits command to its

default setting, use the default forward-digits command. Using the no forward-digits

command specifies that no digits are to be forwarded.

 num-exp: The num-exp global command expands an extension into a full telephone

number or replaces one number with another. The number expansion table manipulates the

called number. This command occurs before the outbound dial peer is matched; therefore,

you must configure a dial peer with the expanded number in the destination pattern for the

call to go through. The number expansion table is useful, for example, where the PSTN

changes the dialing requirements from seven-digit dialing to ten-digit dialing. In this

scenario, you can do one of the following:

— Make all the users dial all ten digits to match the new POTS dial peer that is pointing

to the PSTN.

— Allow the users to continue dialing the seven-digit number as they have before, but

expand the number to include the area code before the ten-digit outbound dial peer is

matched.

Note You must use the show num-exp command to view the configured number-expansion

table. You must use the show dialplan number number command to confirm the presence

of a valid dial peer to match the newly expanded number.

 translation-rule: Digit translation is a two-step configuration process. First, the translation

rule is defined at the global level. Then, the rule is applied at the dial-peer level either as

inbound or outbound translation on either the called or calling number. Translation rules

manipulate the ANI or DNIS digits for a voice call. Translation rules convert a telephone

number into a different number before the call is matched to an inbound dial peer, or before

the outbound dial peer forwards the call; for example, an employee may dial a five-digit

extension to reach another employee of the same company at another site. If the call is

routed through the PSTN to reach the other site, the originating gateway may use

translation rules to convert the five-digit extension into the ten-digit format that is

recognized by the central office (CO) switch.

You can also use translation rules to change the numbering type for a call. For example, some

gateways may tag a number with more than 11 digits as an international number, even when the

user must dial “9” to reach an outside line. In this case, the number that is tagged as an

international number needs to be translated into a national number—without the 9—before it is

sent to the PSTN.

As illustrated in this topic, there are numerous ways to manipulate digits at various stages of

call completion. The administrator needs to determine which command will be most suitable

and the requirements that are necessary for manipulation.

Note To test configured translation rules, you must use the test translation command.

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Cisco GRP Manual de usuario Pagina 31