Polycom 7000 manual Override ITU dialing rules

Site Topology

Field	Description
Dialing method	The ISDN inward dialing method for the site:
	• DID (Direct Inward Dial). Select this option if your ISDN gateway is
	provisioned with a range of phone numbers from the ISDN service provider,
	and each of these numbers will be assigned to an endpoint as an alias.
	• Gateway Extension Dialing. Select this option if your ISDN gateway’s
	ISDN connection is provisioned with a single gateway phone number from
	the ISDN service provider, and endpoints will be assigned an extension
	(E.164 alias) that’s internal to the company and doesn’t correspond to any
	number that can be dialed on the PSTN.
	Endpoints can be dialed from the PSTN by dialing the ISDN gateway
	phone number, followed by a delimiter (usually a #) and the extension
	number. The gateway receives the full number from the PSTN and
	dials only the extension number on the IP network.
ISDN Outbound Dialing
Override ITU dialing rules	Select this check box to override the standard dialing rules, established by the
	International Telecommunications Union, when dialing out using an ISDN
	gateway.
	The default setting, which does not override ITU dialing rules, is usually
	accurate for placing outbound calls. Enable this setting if you find that ISDN
	gateway calls from registered endpoints in this site are unsuccessful.
PBX access code	The code needed to access the ISDN/PSTN network through the site’s PBX
	when dialing out.
Country code	The country code for the site’s location. Click the CC button to select from a
	list of countries.
	To apply ITU dialing rules, the system must compare the country code of the
	gateway site with the country code of the call’s destination.
Area code	The city or area code for the site’s location. Leading zeroes are optional. For
	example, the city code for Paris is 01, but you can enter either 01 or 1 in this
	field.
	To apply ITU dialing rules, the system must compare the area code of the
	gateway site with the area code of the call’s destination.
Always dial area code	Specifies that the area code should always be included in the phone number.
Always dial national prefix	Specifies that the national prefix should always be included in the phone
	number.
Length of subscriber	The number of digits in a phone number. For example, in the United States
number	and other areas using the North American Numbering Plan (NANP),
	subscriber numbers have seven digits.

ISDN Range Assignment (for DID dialing method)

Length of call line identifier

The number of digits in the Call Line Identifier (CLID), which is the dialed number. The maximum is 17.

For example, in the United States, the number of digits in the CLID is often 7 for outside local calls and 11 for callers in a different area code.

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