3 Using Cisco Transport Controller

 

78-11719-02 July 2001

 

Table 3-13

SSM Generation 1 Message Set (continued)

 

 

 

 

 

 

Message

Quality

Description

 

 

 

 

 

 

RES

 

Reserved; quality level set by user

 

 

 

 

 

 

Table 3-14

SSM Generation 2 Message Set

 

 

 

 

 

 

Message

Quality

Description

 

 

 

 

 

 

PRS

1

Primary reference source - Stratum 1

 

 

 

 

 

 

STU

2

Sync traceability unknown

 

 

 

 

 

 

ST2

3

Stratum 2

 

 

 

 

 

 

TNC

4

Transit node clock

 

 

 

 

 

 

ST3E

5

Stratum 3E

 

 

 

 

 

 

ST3

6

Stratum 3

 

 

 

 

 

 

SMC

7

SONET minimum clock

 

 

 

 

 

 

ST4

8

Stratum 4

 

 

 

 

 

 

DUS

9

Do not use for timing synchronization

 

 

 

 

 

 

RES

 

Reserved; quality level set by user

 

 

 

 

 

Procedure: Set Up ONS 15327 Timing

Step 1 Display the CTC node view.

Step 2 Click the Provisioning > Timing tabs (Figure 3-22).

Step 3 Enter the following information:

Timing Mode— Set to External if timing is derived from an external BITS source wired to the MIC; set to Line if timing is derived from an Optical Carrier card.

SSM Message Set— Choose the message set level supported by your network. If a Generation 1 node receives a Generation 2 message, the message will be mapped down to the next available Generation 1. For example, a ST3E message becomes a ST3.

Quality of RES— If your timing source supports the reserve S1 byte, you set the timing quality here. (Most timing sources do not use RES.) Qualities are displayed in descending quality order as ranges. For example, ST3<RES<ST2 means the timing reference is higher than a Stratum 3 and lower than a Stratum 2. See Table 3-13and Table 3-14for more information.

Revertive— If checked, the ONS 15327 reverts back to a primary reference source after the conditions that caused it to switch to a secondary timing reference are corrected.

Revertive Time— If Revertive is checked, enter the amount of time the ONS 15327 will wait before reverting back to its primary timing source.

The BITS Facilities section sets the parameters used by your BITS1 and BITS2 timing references. Many of these settings are determined by the timing-source manufacturer. The BITS 1 port is on MIC-A and the BITS 2 port is on MIC-B.

State— Set the BITS reference to IS (In Service) or OOS (Out of Service). For nodes set to Line timing, set State to OOS; for nodes using external timing, or nodes using the external BITS out, set State to IS.

3-38Cisco ONS 15327 User Documentation

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Cisco Systems manual Procedure Set Up ONS 15327 Timing, SSM Generation 2 Message Set

ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.