AT&T DS1/DMi/ISDN-PRI manual Ext Code, SID Prefix, An Example Application that uses SID

	ADMINISTRATION OPTIONS AND REQUIREMENTS — GENERIC 1	7-145
	Permitted entries are single digit numbers less than or equal to the number
	administered in the Page Length field of the DIAL PLAN RECORD screen. For	example,
	if the Page Length field is translated five (meaning a five digit numbering plan),
	then this field may contain the number 1, 2, 3, 4, or 5. If the Page Length field is
	translated four (meaning a four digit numbering plan), then this field may contain
	the number 1, 2, 3, or 4.
	NOTE: For most applications it is expected that this field will be translated
	with the same number as the Page Length field.
Ext Code	Specifies a single explicit extension number, or a range of extension numbers.
	Permitted entries are any valid extension number, or range of extension numbers
	that are defined on the DIAL PLAN RECORD screen.
	For example, assume that the Ext Len is five and that the Ext Code is administered
	with the digits 65. Then, the range of extension numbers is 65000 through 65999.
SID Prefix	The number that is prefixed to the extension number to form a 10-digit Station
	Identification. The SID prefix can be a 5, 6, 7, 8, 9, or 10-digit number, or blank.
	A typical 6-digit SID prefix would be the switch 3-digit NPA and the 3-digit NNX

(that is, NPANNX). If the number of digits in the SID prefix plus the extension length exceed ten, then excess leading digits from the extension number are deleted when forming the 10-digit SID number. If the SID prefix is a 10-digit number, then the extension number is not used.

An Example Application that uses SID

Assume that the switch has a 5-digit dial plan. For illustration purposes, assume that a company has its billing department (extensions 31000 through 31999) and sales department (extensions 41000 through 41999) located on the same switch. Furthermore, assume that the billing department does not want their individual extension numbers displayed on the far-end but rather wants the company’s LDN (for example, 201-235-3000) displayed. On the other hand, the sales department does want their individual calling party’s number displayed rather than the company’s LDN. Figure 7-77,SID Prefix Table Screen, Sample Application, depicts the appropriate translations to achieve these objectives.

NOTE: If the SID Prefix field is blank, then neither the calling party name or calling party extension number is displayed.