	US 7,489,771 B2
	Systems and methods for implementing call pickup in a SIP environment
Kathleen A. McMurry, Richardson, Tex. (US); John Kenneth Gallant, Plano, Tex. (US); and Mariafranca Gregorat, Dallas, Tex. (US)
Assigned to Verizon Business Global LLC, Basking Ridge, N.J. (US)
Filed on Aug. 07, 2003, as Appl. No. 10/635,560.
Claims priority of provisional application 60/423269, filed on Nov. 02, 2002.
Prior Publication US 2004/0086102 A1, May 06, 2004
Int. Cl. H04M 3/42 (2006.01); H04M 7/00 (2006.01)

U.S. Cl. 379—201.01 [379/211.02; 379/212.01; 379/221.01]

28 Claims

1. A method for providing call pickup in a communications system including a plurality of communication stations operably coupled thereto, the method comprising:

originating a call from a first communication station to a second communication station via a network server;

alerting the second communication station of the call;

storing context information pertaining to the call at a database;

receiving, at the network server, at least one call pickup indication from a third communication station;

responsive to the call pickup indication, obtaining, at the network server, the context information from the database;

establishing an early media dialog between the third communication station and the network server, the establishing including:

sending a session initiated protocol (SIP) provisional response message to the third communication station from the network server; and

using the context information in establishing communication between the first communication station and the third communication station.