![]() ![]() Stratum level 2 timing sources are based on the rare earth element rubidium. A linear relationship exists between the number of nodes passed and the degradation of the timing quality. Stratum level 1 clocks are distributed over networks to provide timing information to a large number of devices. Global positioning system (GPS) satellites provide a stratum level 1 clocking source that provides a cost-effective synchronization system. Cesium clocks used to be very expensive, but most service providers with large central offices now have local stratum level 1 clocks. A stratum level 1 timing source device is an extremely precise clock source using the rare earth element cesium. Network Time Protocol (NTP) is a protocol for synchronizing the clocks of computer systems over IP networks through use of a hierarchical clock strata organization. After installation and service activation, service parameter default values should be verified and modified if required.ĬUCM leverages various IP networking protocols and systems. After installation, enterprise parameter default values should be verified and modified if required.ĬUCM services have configurable parameters that can usually be set per CUCM server. After installation, network services should be checked, and desired feature services have to be activated.ĬUCM has cluster-wide configuration settings called enterprise parameters. Table 5-1 Publisher Server Required Servicesīasic network settings have already been configured during installation, but some of them should be revisited (use of external NTP and DNS servers), and network settings that are not configurable during installation (for example, enabling DHCP services on CUCM) have to be addressed before endpoint deployment.ĬUCM servers run network services (automatically activated) and feature services (activated by the administrator). This initial configuration includes the items in Table 5-1. After you install CUCM, some initial configuration has to be done before starting to deploy endpoints. ![]()
0 Comments
Leave a Reply. |