VeEX RXT-6000e, User Manual

Page: 149 / 387

Regenerator section trace
Used to transmit a 16 or 64-byte identifier (trace) (including a CRC-7 byte) repeatedly so that all regenerators
can verify their connection
Used for continuity testing between regenerators
B1 Byte (RS-BIP)
An 8-bit even parity code used to check for transmission errors over the regenerator section.
Its value is calculated over all the bits of the STS-N frame before scrambling
The checksum value is placed in the SECTION overhead of the following STS-N before scrambling
B1 (Section-BIP) Byte
Order Wire Byte (E1)
Local order wire channel for voice communication between regenerators, cross connects, hubs and remote
terminal locations
F1 Byte
Section user channel
Byte is allocated for user purpose to carry proprietary messages
The channel is terminated at each regenerator location
Data Communications Channel Bytes (D1/D2/D3)
Data Communications Channel (DCC)
D1, D2 and D3 together form a 192kbps message channel for OAM purposes
It can generate internal or external messages
It can also be used as a BER function
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