Cisco ONS 15200 Module Handbook, Release 1.1
Chapter 4, Client Layer Interface Port Module
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Table of Contents

Client Layer Interface Port Module
 4.1 Functional Description
 4.2 Technical Specifications
 4.3 Removing and Replacing a CLIP Module

Client Layer Interface Port Module

This chapter describes the Client Layer Interface Port (CLIP) module.

4.1 Functional Description

You can mount the CLIP module in either the ONS 15201 Single-Channel Unit (SCU) or the ONS 15252 Multichannel Unit (MCU).

  • Figure 4-1 shows the major components of the CLIP module.
  • Figure 4-2 shows the front-panel mounting for single-channel use (ONS 15201).
  • Figure 4-3 shows the rack mounting for multichannel use (ONS 15252).

Figure 4-1   Components of a CLIP module



Figure 4-2   A mounted ONS 15201 SCU CLIP module



Figure 4-3   A mounted ONS 15252 MCU CLIP module


4.1.1 Module Function

The CLIP module controls the electro-optical and high-speed electronic circuits used for extraction and addition of a single wavelength signal in dense wave division multiplexing (DWDM) networks. The CLIP module is controlled through an amplitude-modulated signal superimposed on the traffic signal (Qeyton Proprietary Protocol QPP) and/or a Controller Area Network (CAN) electrical interface.

The CLIP module translates a designated incoming client-layer signal to a DWDM-layer signal with a designated wavelength and amplitude. Additionally, the CLIP module translates a designated DWDM-layer signal and provides an outgoing client-layer signal.

The CLIP with 3R function (see Table 4-3) is available in four versions:

  • 0 dBm transmit, unprotected
  • +7 dBm transmit, unprotected
  • 0 dBm transmit, fiber-protected
  • +7 dBm transmit, fiber-protected

The protected and unprotected configurations of the CLIP module with 3R function (see Table 4-3) are shown in Figure 4-4. The unprotected CLIP module with 3R function does not have a receiver in the B port.

Release 1.1 provides a new CLIP module that incorporates both clocked (3R) and unclocked (2R) data regeneration. You can set the mode of operation (2R or 3R) using the Command Line Interface (CLI) or the Web Interface. Refer to the Cisco ONS 15200 Command Line Interface Manual or the Cisco ONS 15200 Web Interface Software User Manual.

In CLIP Summary, choose the appropriate data rate for 3R operation or choose pass-through for 2R operation between 100 MBps and 1.25 GBps. The new 2R/3R CLIP is fully compatible with the existing 3R CLIP. The CLIP with 2R/3R function (see Table 4-3) is software-configurable for unprotected or fiber protected operation.

In addition, Release 1.1 provides two dispersion tolerances: 1800 ps/nm at +7 dBm, and 3000 ps/nm at 0dBm.

The CLIP module can be installed in Slots 1 to 16.


Figure 4-4   CLIP module in protected and unprotected configuration


4.1.2 Front-Panel Indicators, Connections, and Adjustments

In multichannel units (MCUs), use the LED indicators on the Network Adaptation module (NAM) to monitor CLIP operating parameters. (See "Network Adaptation Module."). In single-channel units (SCUs), the LED indicators are mounted on the SCU front panel. Monitored items include the alarms, power, and status. Table 4-1 lists the conditions indicated by the LEDs. Figure 4-5 shows the LED indicators for the NAM in the MCU and SCU.


Figure 4-5   CLIP Indicators on the NAM front panel for MCU (left) and SCU (right)


Table 4-1   CLIP LED Indicators (NAM and SCU)

LED Orientation Condition (When Lit)

Green

In line

DC power to CLIP module

Yellow

Minor alarm or warning

Red

Critical or major alarm

A and B

Horizontal (2x2 pattern)

Indicate the A and B sides of the DWDM system

A and S

Vertical

Indicate active (A) and standby (S)
Note: The active side carries live traffic and the standby side provides a fail over path.

4.2 Technical Specifications

This section provides optical, electrical, environmental and mechanical specifications for the CLIP module. Default thresholds are also included.

4.2.1 Optical Specifications

Table 4-2 lists optical operating frequencies.

Table 4-2   CLIP Module Operating Frequencies

ITU Channel Frequency (THz) Wavelength (nm)

23

192.3

1558.98

25

192.5

1557.36

27

192.7

1555.75

29

192.9

1554.13

31

193.1

1552.52

33

193.3

1550.92

35

193.5

1549.32

37

193.7

1547.72

43

194.3

1542.94

45

194.5

1541.35

47

194.7

1539.77

49

194.9

1538.19

51

195.1

1536.61

53

195.3

1535.04

55

195.5

1533.47

57

195.7

1531.90

Note   The DWDM side (TxTP) has 1800 ps/nm dispersion tolerance with a 2.5 dB penalty for long reach, and a 3000 ps/nm dispersion tolerance with a 2.0 dB penalty for very long reach.
Note   The CLIPs in the 15200 system are printed on the faceplate, for example, V/2R3R/CHxx.

The printing V/2R3R/CHxx as in the example given above means:

  • V very long range
  • (L long range)
  • 2R3R 2R/3R
  • (3R 3R)
  • CHxx ITU channel xx

The CLIPs are available in two different versions. (See Table 4-3.)

Table 4-3   CLIP Versions

Function Dispersion tolerance DWDM side
optical output power 		range/short form

3R

1800 ps/nm

+7 dBm

long/L

2R/3R

3000 ps/nm

0 dBm

very long/V (with external amplifier)

Note   The 2R function retransmits the optical signal with electrical regeneration and reshaping but without retiming. The 3R function regenerates, reshapes, and retimes the optical signal.

4.2.2 Electrical Specifications

At maximum operating temperature and input voltage, the CLIP module consumes 8 watts at most.

4.2.3 Environmental Specifications

Temperature and current characteristics for the CLIP module are listed in the next six tables. The bias currents specified are at calibration time.

Table 4-4   CLIP Peltier Current

Threshold Percentage of maximum current

High alarm

95%

High warning

80%

Low warning

-80%

Low alarm

-95%

Table 4-5   CLIP Board Temperature

Threshold Degrees Celsius

High alarm

80

High warning

70

Low warning

10

Low alarm

0

Table 4-6   DWDM Laser Temperature Deviation

Threshold Degrees Celsius

High alarm

+2.5

High warning

+1.0

Low warning

-1.0

Low alarm

-2.5

Table 4-7   DWDM Laser Bias Current

Threshold Percentage of calibration current

High alarm

200%

High warning

150%

Low warning

70%

Low alarm

40%

Table 4-8   Client Laser Bias Current

Threshold Percentage of calibration current

High alarm

300%

High warning

200%

Low warning

50%

Low alarm

20%

Table 4-9   CLIP Operating Conditions

Item Specification

Normal operating temperature

Short term operating temperature
for equipment shelves
(per GR-63, NEBS level 3)

+5°C to +40°C (41°F to 104°F)

-5°C to +55°C (23°F to 131°F)

Rate of temperature change

30°C/h (54°F/h)

Normal operating relative humidity

Short term operating relative humidity (per GR-63, NEBS level 3)

5 to 85%, but not to exceed 0.024 kg water per kg dry air

5 to 90%, but not to exceed 0.024 kg water per kg dry air

4.2.4 Default Thresholds

The default thresholds follow:

  • The data rate is STM-16/OC-48.
  • The switchmode (for protected channels) is automatic.
  • Alarm suppression/inhibition is off.
  • The optical transmitter output level (toward the client) is -9 dBm nominal.
  • The optical receiver thresholds (from the client) are specified in Table 4-10.
  • FDI switching enabled

Table 4-10   Client-Side Receiver Default Thresholds

Threshold dBm

High alarm

-3

High warning

-6

Low warning

-16

Low alarm

-20

The optical transmitter output level (toward the DWDM line) is 0 dBm (nominal) for medium range, +7 dBm (nominal) for long range, and 0 dBm (nominal) for very long range.

The optical receiver thresholds (from the DWDM line) are specified in Table 4-11.

Table 4-11   DWDM-Side Receiver Default Thresholds

Threshold dBm

High alarm

-8

High warning

-10

Low warning

-28

Low alarm

-31

4.2.5 Mechanical Specifications

Table 4-12 lists the physical dimensions of the CLIP module.

Table 4-12   CLIP Module Mechanical Specifications

Item Dimension

Panel depth

264 mm (10.4 in.)

Panel height

263 mm (10.3 in.)

Panel width

25 mm (1.0 in.)

Panel weight

0.84 kg (1.8 lbs.)

4.3 Removing and Replacing a CLIP Module

This section explains how to remove and replace the Client Layer Interface Port (CLIP) module for protected and unprotected channels. This module is used in both the ONS 15252 Multichannel Unit (MCU) and the ONS 15201 Single-Channel Unit (SCU). Figure 4-4 shows an unprotected and a protected CLIP module.

The following removal and replacement procedures assume that you are removing and replacing the same type of CLIP module.

In applications with unprotected channels, the fiber on the B side of the CLIP is not connected to the NAM.

Install a protected CLIP module with a NAM that has a splitting ratio of 50/50, 10/90, or 90/10. Install an unprotected CLIP module with a NAM that has a splitting ratio of 100/0 or 0/100.

Caution   Be careful not to pull or make sharp bends in the optical fibers. Always clean and inspect MU or SC connectors with proper tools before inserting them into the adapters.

4.3.1 Removal Instructions

The following paragraphs describe the removal procedures for CLIP modules for both protected and unprotected channels.

Remove the Protected Client Layer Interface Port Module

Before removing a CLIP module, you should retrieve and write down the switchmode, data rate, protect/unprotected mode, and FDI enabled/disabled settings for the CLIP module using the ONS 15200 web-based interface Path Summary screen. The default setting for datarate is STM-16/OC-48. To modify the settings, use the Cisco ONS 15200 Web Interface Software User Manual.

Step 1   Disconnect the client-side optical fiber connectors from the CLIP module.

Step 2   Protect the fiber ends with SC dust caps.

Step 3   Plug the ports with SC dust plugs.

Step 4   Disconnect the DWDM-layer Tx-to-CLIP module optical fiber.

Step 5   Protect the connector with an MU fiber cap.

Step 6   Plug the associated MU adapter on the CLIP module front panel with an MU dust plug.

Step 7   Disconnect the DWDM receiver A-side and B-side optical fiber connectors from the CLIP module, one at a time.

Step 8   Protect the connectors with MU fiber caps.

Step 9   Plug the associated MU adapters on the CLIP module front panel with MU dust plugs.

Step 10   Loosen the CLIP module mounting thumbscrews.

Step 11   Carefully remove the CLIP module from the ONS 15252 MCU or the ONS 15201 SCU. Make sure that the optical fibers are not harmed in the process.

Step 12   Install a CLIP module dummy front where the CLIP module was removed from the ONS 15252 MCU or the ONS 15201 SCU unit, unless you will replace it immediately.




Remove an Unprotected Client Layer Interface Port Module

Before removing a CLIP module, you should retrieve and write down the switchmode, data rate, protect/unprotected mode, and FDI enabled/disabled settings for the CLIP module using the ONS 15200 web-based interface Path Summary screen. The default setting for datarate is STM-16/OC-48. To modify the settings, see the Cisco ONS 15200 Web Interface Software User Manual.

Step 1   Disconnect the client-side optical fiber connectors from the CLIP module.

Step 2   Protect the fiber ends with dust caps.

Step 3   Plug the ports with SC dust plugs.

Step 4   Disconnect the DWDM-layer Tx-to-CLIP module optical fiber.

Step 5   Protect the connector with an MU fiber cap.

Step 6   Plug the associated MU adapter on the CLIP module front panel with an MU dust plug.

Step 7   Disconnect the DWDM receiver A-side optical fiber connector from the CLIP module.

Step 8   Protect the connector with an SC fiber cap.

Step 9   Plug the associated MU adapter on the CLIP module front panel with an MU dust plug.

Step 10   Loosen the CLIP module mounting thumbscrews.

Step 11   Carefully remove the CLIP module from the ONS 15252 MCU or the ONS 15201 SCU. Ensure that the optical fibers are not harmed in the process.

Step 12   Install a CLIP module dummy front where the CLIP module was removed from the ONS 15252 MCU or the ONS 15201 SCU unit, unless you will replace it immediately.




4.3.2 Replacement Instructions

The following paragraphs describe the replacement procedures for CLIP modules for both protected and unprotected channels.

Replace the Protected Client Layer Interface Port Module

Step 1   Remove the CLIP module dummy front from the ONS 15252 MCU or ONS 15201 SCU, if necessary.

Step 2   Align the CLIP module with the CLIP module slot.

Step 3   Carefully insert the CLIP module into the slot. Be sure that the backplane connector and the CLIP module connector are correctly mated and that no optical fibers are damaged in the process.

Step 4   Tighten the CLIP module mounting thumbscrews.

Step 5   Remove the DWDM receiver dust plug from the A-side MU adapter on the CLIP module front.

Step 6   Remove the fiber cap from the A-side DWDM receiver optical fiber coming from the NAM (MCU) or CFM (SCU).

Step 7   Clean and inspect the fiber end and insert it into the A-side MU adapter.

Step 8   Remove the DWDM receiver dust plug from the B-side MU adapter on the CLIP module front.

Step 9   Remove the fiber cap from the DWDM B-side optical fiber coming from the NAM or the CFM.

Step 10   Clean and inspect the fiber end and insert it into the B-side MU adapter.

Step 11   Remove the dust plug from the CLIP module DWDM-layer transmit MU adapter.

Step 12   Remove the fiber cap from the DWDM-layer transmit fiber coming from the NAM or the CFM.

Step 13   Clean and inspect the fiber end and insert it into the DWDM-layer transmit adapter on the CLIP module.

Step 14   Remove the dust plug from the client-layer receive input on the CLIP module.

Step 15   Remove the fiber cap from the client-layer optical fiber intended for the client-layer receive port.

Step 16   Clean and inspect the fiber end and insert it into the client-layer receive port.

Step 17   Remove the dust plug from the client layer transmit port.

Step 18   Remove the fiber cap from the optical fiber intended for the client layer transmit port.

Step 19   Clean and inspect the fiber end and insert it into the client layer transmit port.

Step 20   Check the switchmode, data rate, protect/unprotected (2R/3R only) mode and FDI enabled/disabled (2R/3R only) settings of the 2R/3R CLIP. To modify the settings, see the Cisco ONS 15200 Web Interface Software User Manual.




Replace an Unprotected Client Layer Interface Port Module

Step 1   Remove the CLIP module dummy front from the ONS 15252 MCU or ONS 15201 SCU, if necessary.

Step 2   Align the CLIP module with the CLIP module slot.

Step 3   Carefully insert the CLIP module into the slot. Be sure that the backplane connector and the CLIP module connector are correctly mated and that no optical fibers are damaged in the process.

Step 4   Tighten the CLIP module thumbscrews.

Step 5   Remove the DWDM receiver dust plug from the A-side MU adapter on the CLIP module front.

Note    Do not remove the B-side dust plug under any circumstances.

Step 6   Remove the fiber cap from the DWDM receiver optical fiber coming from the NAM (MCU) or CFM (SCU).

Step 7   Clean and inspect the fiber end and insert it into the A-side MU adapter.

Step 8   Remove the dust plug from the DWDM-layer transmit MU adapter.

Step 9   Remove the fiber cap from the DWDM-layer transmit fiber coming from the NAM or CFM.

Step 10   Clean and inspect the fiber end and insert it into the DWDM-layer transmit port.

Step 11   Remove the dust plug from the client-layer receive port.

Step 12   Remove the fiber cap from the optical fiber that is intended for the client-layer receive port.

Step 13   Clean and inspect the fiber end and insert it into the client-layer receive port or input adapter.

Step 14   Remove the dust plug from the client-layer transmit port.

Step 15   Remove the fiber cap from the optical fiber intended for the client-layer transmit port.

Step 16   Clean and inspect the fiber end and insert it into the CLIP module client-layer transmit port.

Step 17   Check the switchmode, data rate, protect/unprotected (2R/3R only) mode and FDI enabled/disabled (2R/3R only) settings of the 2R/3R CLIP. To modify the settings, see the Cisco ONS 15200 Web Interface Software User Manual.




4.3.3 Firmware Configuration

The EEPROM holds important information about identity, parameters, and calibration constants. The EEPROM has a size of 16 K and a serial interface.