1. A method for allowing a stand-by server to operate as a replacement for a main server, comprising:
detecting, by a stand-by server, lack of a signal initiated by a main server, wherein reception of said signal is indicative of availability of said main server;
establishing a connection with at least one client connection device by said stand-by server to support a call, wherein said stand-by server operates as a replacement for said main server;
requesting current call state information from said client connection device;
receiving current call state information from said client connection device; and
updating a call state information resource based on said current call state information received from said client connection device.
2. The method of claim 1, further comprising:
receiving configuration information.
3. The method of claim 1, wherein said establishing a connection with at least one client connection device includes establishing a connection with said client connection device using an IP address known to said client connection device.
4. The method of claim 1, wherein said requesting current call state information from said client connection device includes requesting information from said client connection device regarding status of at least one communication line supported by said client connection device.
5. The method of claim 1, wherein said receiving current call state information from said client connection device includes receiving information regarding status of at least one communication line supported by said client connection device.
6. The method of claim 1, further comprising:
prior to said detecting lack of a signal initiated by said main server, receiving at least one signal initiated by said main server, said at least one signal being indicative of availability of said main server.
7. The method of claim 1, further comprising:
requesting information regarding availability of said main server after said detecting lack of a signal initiated by said main server indicative of availability of said main server.
8. A method for allowing a stand-by server to take over support for communications from a main server, comprising:
detecting lack of a signal sent initiated by a main server, wherein reception of said signal is indicative of availability of said main server;
establishing a connection with at least one client connection device by said stand-by server to support a call, wherein said stand-by server operates as a replacement for said main server;
requesting that said client connection device reset an active call to a designated call state; and
creating a call state information resource based, at least in part, on said designated call state.
9. The method of claim 8, further comprising:
receiving configuration information.
10. The method of claim 8, further comprising:
prior to said detecting lack of a signal initiated by said main server, receiving at least one signal initiated by said main server, said at least one signal being indicative of availability of said main server.
11. The method of claim 8, further comprising:
requesting information regarding availability of said main server after said detecting lack of a signal initiated by said main server indicative of availability of said main server.
12. A method for allowing a stand-by server to take over support for communications from a main server, comprising:
a main server establishing at least one connection with at least one client connection device for support of at least one call;
said main server providing at least one signal to a stand-by server when said main server is available;
said stand-by server establishing at least one connection with said at least one client connection device to support said at least one call when said stand-by server does not receive a designated number of signals from said main server indicative of availability of said main server, wherein said stand-by server operates as a replacement for said main server;
said stand-by server requesting call state information from said at least one client connection device; and
said stand-by server updating a call state information resource based on said call state information received from said at least one client connection device.
13. A method for allowing a stand-by server to take over support for communications from a main server, comprising:
a main server establishing at least one connection with at least one client connection device for support of at least one call;
said main server providing at least one signal to a stand-by server when said main server is available;
said stand-by server establishing at least one connection with said at least one client connection device to support said at least one call when said stand-by server does not receive a designated number of signals from said main server indicative of availability of said main server, wherein said stand-by server operates as a replacement for said main server;
said stand-by server requesting said at least one client connection device to reset to a designated call state; and
said stand-by server creating a call state information resource based, at least in part, on said designated call state.
14. A computer program product in a computer readable medium for facilitating communications, comprising:
instructions for directing a first server to establish at least one connection with at least one client connection device for support of at least one call;
instructions for directing said first server to initiate at least one signal sent to a second server when said first server is available, said signal being indicative of availability of said first server to support said at least one call;
instructions for directing said second server to establish at least one connection with said at least one client connection device to support said at least one call when said second server does not receive a designated number of signals initiated by said first server indicative of availability of said first server, wherein said stand-by server operates as a replacement for said main server;
instructions for directing said second server to request call state information from said at least one client connection device; and
instructions for directing said second server to update a call state information resource based on said call state information received from said at least one client connection device.
15. A computer program product in a computer readable medium for facilitating communications, comprising:
instructions for directing a first server to establish at least one connection with at least one client connection device for support of at least one call;
instructions for directing said first server to initiate at least one signal sent to a second server when said first server is available, said signal being indicative of said first server being available to support said at least one call;
instructions for directing said second server to establish at least one connection with said at least one client connection device to support said at least one call when said second server does not receive a designated number of signals initiated by said first server indicative of availability of said first server, wherein said stand-by server operates as a replacement for said main server;
instructions for directing said second server to request said at least one client connection device to reset to a designated call state; and
instructions for directing said second server to create a call state information resource based, at least in part, on said designated call state.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A process to prepare a multi-metallic procatalyst comprising
(a) reacting a hydrocarbon-soluble organomagnesium compound or complex thereof and an active non-metallic or metallic halide to form a halogenated magnesium support;
(b) contacting the magnesium halide support with a conditioning compound containing an element selected from the group consisting of boron, aluminum, gallium, indium and tellurium under conditions sufficient to form a conditioned magnesium halide support;
(c) contacting the conditioned magnesium halide support and a compound containing, as a first metal, titanium, to form a supported titanium compound;
(d) contacting the supported titanium compound and a second metal and a third metal independently selected from the group consisting of zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten, provided that the second metal and the third metal are not the same; and further provided that the molar ratio of the magnesium to a combination of the titanium and the second and third metals ranges from 30:1 to 5:1; under conditions sufficient to form a multi-metallic procatalyst.
2. A multi-metallic procatalyst obtained according to the process of claim 1.
3. The procatalyst of claim 2 wherein the molar ratio of magnesium to titanium ranges from 8:1 to 80:1.
4. A multi-metallic polymerization catalyst comprising the reaction product of the multi-metallic procatalyst of claim 2 and an organometallic cocatalyst.
5. A polyethylene polymer prepared by a process wherein ethylene and optionally one or more olefin comonomers are polymerized in the presence of the multi-metallic polymerization catalyst of claim 4.
6. The polyethylene polymer of claim 5 having a polydispersity (PDI) of less than 3.5, and a MWCCR in the range of 0.75 to 1.10.
7. The polyethylene polymer of claim 5 or 6 characterized as greater than or equal to 1 parts by combined weight of at least three metal residues remaining from the multi-metallic polymerization catalyst per one million parts of polyethylene polymer, where such metals are selected from the group consisting of titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, and combinations thereof, and wherein each said residual metal is present at least 0.4 ppm.
8. The polyethylene polymer of claim 5 or 6, wherein said polyethylene is characterized by one of the following properties:
(a) a density in the range of from 0.900 to 0.960 gcm3; or
(b) a melt index (I2) in the range of from 0.1 to 50 g10 minutes; or
(c) a melt flow ratio (I10I2) in the range of from 6 to 10.
9. A composition comprising the polyethylene polymer of claim 5 or 6, and one or more polymers or one or more additives.
10. An article comprising the polyethylene polymer of claim 5 or 6.