Vocality V200, Руководство пользователя

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Vocality User Manual
User Manual for V200
Valid for V08_08.02 or V08_48.02
Page 84 of 114
This section assumes you are familiar with configuring Vocality equipment and have a
knowledge of configuring and using the Digital Voice cards.
5.15.1 Hardware configuration
Vocality V150 or V200 with one or more Digital Voice Cards.
5.15.2 Software configuration
Digital Voice cards may need to derive clock from the equipment connected to the
E1/T1 port, such as a PABX or PSTN. In this case we need to drive GC1 or GC2 from the
external line/device, with the E1/T1 configured to use GC1/GC2 as its clock source. The
solution is to lock the reference clock GC2, say, to an external source. Reference clock
GC2 will be setup to use Digital Voice card port X as its primary reference and port Y as
its secondary reference, as shown in Figure 5-45 . In this way, irrespective of which port
is active, GC2 will always be locked to the external PABX or other equipment connected
to this card.
Note: GC1 is used to clock the rest of the node as is our convention.
Figure 5-45 Clocking menu showing GC2 sourced from Port X & Y
You now need to setup the Digital Voice card with parameter 'TX CLK SRC' set to Int
(internal) and parameter 'PLL REF' set to GC2 as shown in Figure 5-46 .