Abstract: A host upgrade method and a device include selecting at least one target host from a plurality of hosts for an upgrade. After the at least one target host is selected, a service running on all virtual machines that are in one or more target service groups and that are deployed on the at least one target host is stopped, and a service running on a virtual machine that is in the one or more target service groups and that is not deployed on the at least one target host is maintained. Then, the at least one target host is upgraded.

Abstract: A host upgrade method and a device include selecting at least one target host from a plurality of hosts for an upgrade. After the at least one target host is selected, a service running on all virtual machines that are in one or more target service groups and that are deployed on the at least one target host is stopped, and a service running on a virtual machine that is in the one or more target service groups and that is not deployed on the at least one target host is maintained. Then, the at least one target host is upgraded.

Abstract: A method for service transport and a method for IP-based service transport are disclosed. The calling and called parties negotiate the type of a service and a corresponding codec scheme before a call is set up, and after the call is set up normally, during the call, the MGW keeps detecting and reporting service-related signaling to the MGC. The MGC determines the type of the service and switches to a corresponding codec scheme. For a facsimile or Modem service, it may be determined from characteristic signaling whether the service is a high-speed facsimile or a Modem service. If G.711 Red capable of bearing voice, facsimile and data is used, T.38 codec scheme may be switched to upon determination of the high-speed facsimile or Modem service. The type of a service may be determined from in-band characteristic signaling of V21, CM, etc.