Polycom SIP 3.1 manual Dir.corp.viewPersistence, 600, and 601 legacy phones, use

			Configuration Files
	Permitted
Attribute	Values	Default	Interpretation
dir.corp.attribute.x.sticky	0, 1	Null	If set to 0 or Null, the filter criteria for
			this attribute is reset after a reboot.
			If set to 1, the filter criteria for this
			attribute is retained through a
			reboot.
			Such attributes are denoted with a
			“*” before the label when displayed
			on the phone.
dir.corp.attribute.x.filter	UTF-8 encoded	Null	The filter string for this attribute,
	string		which is edited when searching.
dir.corp.backGroundSync	0, 1	0	If set to 0 or Null, there will be no
			background downloading from the
			LDAP server.
			If set to 1, there will be background
			downloading of data from the LDAP
			server.
dir.corp.backGroundSync.period	3600 to 604800	86400	The corporate directory cache is
	seconds		refreshed after the corporate
			directory feature has not been used
			for this period of time.
			The default period is 24 hours. The
			minimum is 1 hour and the
			maximum is 7 days.
dir.corp.viewPersistence	0, 1	1	If set to 0, the browse position in the
			data on the LDAP server and the
			attribute filters are reset for
			subsequent usage of the corporate
			directory.
			If set to 1or Null, the browse
			position in the data and the attribute
			filters are retained for subsequent
			usage of the corporate directory.
dir.corp.leg.viewPersistence	0, 1	0	This parameter is the same as
			dir.corp.viewPersistence.
			Note: For SoundPoint IP 301, 501,
			600, and 601 legacy phones, use
			“leg” tagged parameter. This
			prevents slow behavior after exiting
			from the corporate directory.

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