VeEX MPA, Руководство пользователя

Страница: 290 / 842

SONET Tab
290
TC Trace
The TC Trace is a repeating 16-byte or 1-byte pattern that
can be configured to send the system's default ASCII pattern,
a customized user-defined ASCII pattern, or a 1-byte
hexadecimal pattern.
The following options are available:
•
Default (16 byte) : Selects the default 16-byte ASCII
message as the transmitted trace pattern. The
message consists of 15 ASCII characters, appended
with a CRC-7 at the end of the message.
•
User Defined (16 byte) : Selects a 16-byte user-
defined ASCII message as the transmitted trace
pattern. The message is entered and saved using a
touch screen keyboard. The user-defined message
can be up to 15 ASCII characters, appended with a
CRC-7 at the end of the message.
•
All 01's - Selects an All Ones (0x01) hexadecimal
pattern as the transmitted trace pattern. The 0x01 byte
value repeats indefinitely and does not contain CRC-7.
•
All 00's - Selects an All Zeros (0x00) hexadecimal
pattern as the transmitted trace pattern. The 0x00 byte
value repeats indefinitely and does not contain CRC-7.
•
User Defined (1 byte) : Selects a user-defined
Hexadecimal byte value as the transmitted trace
pattern. The byte value is entered and saved using a
touch screen keypad (from 0x00 to 0xFF). The byte
value repeats indefinitely and does not contain CRC-7.
Enable TCM mode (using TC Overhead Processing )
before sending the TC Trace.
The TC trace is part of the TCM Overhead and is known
as the TCM trace or the Z5 byte when Path TCM is Enabled
or the Z6 bytes when VT TCM is Enabled.
SONET Transmit - PTR
Manually changing the Pointer Value provides another method for stress testing a
network to verify if the receiving equipment can detect Pointer Value changes.
MPA_e_manual_D07-00-129P_RevA00