Table of Contents
Advertisement
Setting the Interfaces
Setting SDH THRU Mode
Setting SDH THRU Mode
Description
THRU mode is used to non-intrusively monitor SDH lines where no protected
monitor points are available. To enable THRU mode select the
TRANSMIT
page. Select SIGNAL RATE before selecting THRU mode.
MAIN SETTINGS
The entire frame can be errorred at a user defined rate if PAYLOAD OVERWRITE
and SOH+POH CHANNEL OVERWRITE are both set to
. If either
OFF
overwrite is enabled the ENTIRE FRAME ERROR RATE function is disabled.
Jitter can be added to the STM-0, STM-1, STM-4 and STM-16 signal.
There are nominally three modes of operation as follows:
1. Transparent mode: This is the case when the PAYLOAD OVERWRITE field is
set to OFF. The received signal is passed through the transmitter completely
unchanged. The figure below illustrates the settings for this mode.
2. Hitless THRU Mode
This mode enables you to change the channel under test and the payload mapping
without causing errors in the line signal or any other payload channel, or having to
switch out of THRU mode. When you select a Payload Overwrite choice (other than
OFF) an additional field is displayed which allows you to enable/disable Payload
Overwrite. If Payload Overwrite is disabled the instrument remains transmitting
while you select another channel/tributary (see figure on next page). In this mode
any Section or Line B1,B2 BIP errors are recalculated before transmission.
38
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Advertisement
Table of Contents
