1
Download User`s Manual
Transcript
Mediant 800 MSBG When the client receives a response to its request from the identified NTP server, it must be interpreted based on time zone or location offset that the system is to a standard point of reference called the Universal Time Coordinate (UTC). The time offset that the NTP client uses is configurable using the ini file parameter NTPServerUTCOffset, or via an SNMP MIB object (refer to the Product Reference Manual). If required, the clock update is performed by the client as the final step of the update process. The update is performed in such a way as to be transparent to the end users. For instance, the response of the server may indicate that the clock is running too fast on the client. The client slowly robs bits from the clock counter to update the clock to the correct time. If the clock is running too slow, then in an effort to catch the clock up, bits are added to the counter, causing the clock to update quicker and catch up to the correct time. The advantage of this method is that it does not introduce any disparity in the system time that is noticeable to an end user or that could corrupt call timeouts and timestamps. 9.5 Network Configuration The device allows you to configure up to 12 different IP addresses with associated VLANs for the VoIP network, using the Multiple Interface table. Complementing this table is the Routing table, which allows you to define VoIP network static routing rules for non-local hosts/subnets. This section describes the various network configuration options offered by the device. This section covers the VoIP network configuration (interfaces, static routing rules, and QoS definitions). For configuring the data-routing network (interfaces, routing, firewall, NAT, etc.), see Data Settings on page 222. 9.5.1 Multiple Network Interfaces and VLANs A need often arises to have logically separated network segments for various applications (for administrative and security reasons). This can be achieved by employing Layer-2 VLANs and Layer-3 subnets. Figure 9-1: Multiple Network Interfaces SIP User's Manual 620 Document #: LTRT-12804
