
Configuring Line Services
6-22 115391-A Rev. A
Setting the Interframe Time Fill Pattern
You can select the interframe time fill pattern for transmission across this logical
line.
• Flags selects an 0x7E pattern (0 1 1 1 1 1 1 0).
• Idles selects an 0xFF pattern (1 1 1 1 1 1 1 1).
The BayStream software uses Flags by default. You can set the line interframe
time-fill character.
Setting the CRC Size
By default, the BayStream software uses the 16-bit cyclic redundancy check
(CRC) type. With 16-bit CRC, the software appends a 16-bit CRC to the
transmitted frames and performs a 16-bit CRC on received frames. You can
change to 32-bit CRC, where the software appends a 32-bit CRC to transmitted
frames and performs a 32-bit CRC on received frames.
You can set CRC size for the logical line.
Setting the MTU Size
The Baystream software uses the transmit/receive buffer size (MTU) to configure
the largest frame that it can transmit or receive across this MCE1 port. It discards
frames larger than this value. The MTU is 1600 bytes by default. You can change
it to any size from 3 through 4608 bytes for the logical line.
Site Manager: Interframe Time Fill Character parameter: page A-41
Site Manager: CRC Size parameter: page A-41
Site Manager: MTU Size (bytes) parameter: page A-41
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