	US 7,596,131 B1
	Advanced voice communication feature transparency in a telecommunications network
Lev Volftsun, Herndon, Va. (US); Clay H. Neighbors, Reston, Va. (US); Fred R. Rednor, Arlington, Va. (US); Andrew H. West, High Wycombe (United Kingdom); Adrian R. Kingston, Gainsville, Va. (US); and Mikhail Rabinovitch, Herndon, Va. (US)
Assigned to Cisco Technology, Inc., San Jose, Calif. (US)
Filed on Jun. 09, 2006, as Appl. No. 11/450,029.
Application 11/450029 is a continuation of application No. 10/662019, filed on Sep. 11, 2003, granted, now 7,113,504.
Application 10/662019 is a continuation of application No. 09/106449, filed on Jun. 30, 1998, granted, now 6,650,632.
Int. Cl. H04L 12/66 (2006.01)

U.S. Cl. 370—352 [370/354]

22 Claims

1. An apparatus, comprising:

a communications interface;

one or more processors coupled to said communications interface; and

a memory coupled to said one or more processors and storing instructions which, when executed with said one or more processors, cause said one or more processors to allow an advanced voice communication feature in a virtual private network with program functions that comprise:

determining, upon a call connected between a first and a second private network of said virtual private network through a first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, establishing an auxiliary connection between said first and said second private networks through a second communication network wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.