4.9 PSTN Group Config
This menu manages the setting of configuration parameters related to PSTN group. When using
this device, users need to configure some sub-menus in this interface menu first. The submenus
include: clock source, E1/T1 parameters, port number, codec group, PSTN rule group and other
related parameters. In general, users need to first confirm the clock source obtaining method,
configure E1 or T1 parameters according to different country settings, set the corresponding ports
and grouping rules, etc.
4.9.1 Clock Source
When clock source is produced by the local crystal chip of MTG2000, it is regarded as local
clock source. When clock source is obtained from the data received by E1/T1 ports, it is
regarded as remote clock source. Each E1/T1 port can obtain one clock source.
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