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5
Setting the Interfaces
Setting SONET Transmit Interface
4 Choose FOREGROUND , BACKGROUND
MAPPING and type of payload.
Mapping may be selected from a pictorial display by moving the cursor to
MAPPING and pressing .
Use and to move between STS Layer choice, VT Layer choice and
Payload Layer choice. Use and to choose the mapping.
Use to confirm your choice and return to the
display.
5 If VT-6 mapping is chosen, VT CONCATENATION selection is
enabled, choose or the tributary at which the concatenation
begins, VT6-2C through VT6-6C.
The BACKGROUND, PATTERN IN OTHER VT-6’s is fixed at
NUMBERED, that is, each VT-6 contains a unique number to allow
identification in case of routing problems.
6 If required, choose DS1/2M/34M/DS3 OFFSET value. See “Adding
Frequency Offset to SONET Signal” page 31
7 If FULL SPE, VT-6, VT-2 or VT-1.5 mapping is chosen, choose the test
tributary CHANNEL, including the STS-3 for an OC-12/OC-48 signal.
8 Choose the payload framing under PAYLOAD TYPE or VT PAYLOAD.
If is required must be chosen.
If is chosen, the Payload test signal must be set up. See
“Setting Transmit Structured Payload/Test Signal” page 37.
If is chosen, see “Inserting an External DSn Payload/Test
Signal” page 43.
F/G MAPPING
B/G MAPPING
SET
SET
SONET
MAIN SETTINGS
OFF
STRUCTURED
FRAMED
STRUCTURED
INSERT