GatesAir Intraplex NetXpress, Инструкция по установке и эксплуатации

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4—System Configuration and Operation Intraplex NetXpress IP Multiplexer
Version 3.05
GatesAir, Inc. 4-35
Intraplex Products
Secondary Timing Source Status: The current operational status (up, down) of the secondary timing
source.
Primary Timing Source: The primary timing source for the NetXpress shelf. Timing choices are
Internal , External , Stream , E1 / T1 Port A , E1 / T1 Port B , or SynchroCast3 .
Internal can only be chosen as the Primary Timing Source for a single NetXpress system within your
network. All remaining NetXpress systems can derive that same timing source using Stream or E1/T1
timing.
Multiple systems can be set to External Timing if a common source of external timing is available at all
locations. This is typically a satellite (GPS) derived clock or a public telecom network clock source.
External timing must be cabled into the NetXpress system using the TIMING IN jack on the MIU-201.
Streams must be placed out-of-service to change the primary or secondary timing source selection.
SynchroCast3 is a valid choice for timing only if you have an SNC-101T module installed in the
NetXpress system. If you selected SynchroCast3 timing as the primary timing source, you cannot select
External as the secondary timing source.
Secondary Timing Source: The secondary timing source for the NetXpress shelf. Choices are Internal ,
External , Stream , E1 / T1 Port A , or E1 / T1 Port B . The secondary timing source cannot be the same as
the primary timing source except in the case of Stream , but even then the selected streams must be
unique.
Primary RX Timing Stream: If the primary timing source is set to Stream , this field shows the stream
name to use as the timing source.
Secondary RX Timing Stream: If the secondary timing source is set to Stream , this field shows the
stream name to use as the timing source.
Primary Stream Network Type: The network quality to be applied for clock recovery from the primary
stream ( Dedicated , Metro , Continental ).
Secondary Stream Network Type: The network quality to be applied for clock recovery from the
secondary stream ( Dedicated , Metro , Continental ).
Timing Input 100 Ohm Impedance: Enabling/Disabling switch. Controls the external timing input
impedance, 100 ohms at the TIMING IN port. The Timing In connector is a balanced RS-422/RS-485
input. This switch is normally set to Enabled . To change the TIMING IN to a high impedance input, select
Disabled and click Submit to apply your changes.
VCXO Timing Calibration Value: Timing calibration value (in ppm) for the voltage controlled crystal
oscillator (factory calibration only).
Submit: Click this button to apply all system timing information changes.
4.4.3.8 System TOS Byte Definitions
Access the System TOS Byte Definitions page (Figure 4-37) to view or modify the TOS byte values
associated with High COS, Normal COS, Medium COS and Low COS, as well as TOS byte values for Web,
SNMP, and Voice Signaling. To access the page, point to
System Cfg and click TOS Byte Definitions .