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From R7.3.1 onwards, the 1.2T card supports PRBS on ODU4.

Note

NCS 1004 trunk port supports the following PRBS patterns:

• PRBS31 — Sequence length is from 2^31 -1 bits.

• PRBS23 — Sequence length is from 2^23 -1 bits.

• PRBS15 — Sequence length is from 2^15 -1 bits.

• PRBS7 —Sequence length is from 2^7 -1 bits.

Limitations of PRBS

There are following limitations with the PRBS feature:

• There is no SNMP support to fetch the PRBS status or Performance Monitoring (PM).

• TTI functionality is not supported with PRBS.

• Loopback and PRBS configurations cannot coexist on a coherentDSP controller. Loopback configuration

will be rejected if PRBS is already configured.

• PRBS on ODU4 is supported only when the slice is provisioned in OTN client mode.

PRBS on OTN-XP Card

From R7.2.1 onwards, the OTN-XP card supports PRBS on the mapper optical data unit (ODU2e).

NCS 1004 with the OTN-XP card, supports the following PRBS mode:

• Source mode — The NCS 1004 at trunk port generates PRBS signal on the line continuously as per the

configured PRBS pattern.

• Sink mode — The NCS 1004 at trunk port gets locked to the ingress signal according to the configured

pattern, analyzes and reports the errors.

• Source-Sink mode — The NCS 1004 at trunk port acts as both the PRBS transmitter and receiver, that

is, it generates PRBS signal as per the configured pattern, and also gets locked to the ingress signal with

the same pattern, and reports the errors.

• invertedpn31 —Inverted pattern. Sequence length is from 2^31 -1 bits.

NCS 1004 trunk port supports the following PRBS patterns:

• PRBS31 — Sequence length is from 2^31 -1 bits.

• PRBS23 — Sequence length is from 2^23 -1 bits.

• PRBS15 — Sequence length is from 2^15 -1 bits.

• PRBS7 —Sequence length is from 2^7 -1 bits.

Configuring Controllers

Pseudo Random Binary Sequence

Cisco NCS1004 User Manual

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