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This chapter describes the Client Layer Interface Port (CLIP) module.
You can mount the CLIP module in either the ONS 15201 SCU or the ONS 15252 MCU.
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 QPP and/or a 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 CLIPs with 2R/3R function (see Table 4-3) are available in two versions:
The protected configurations of the CLIP module with 2R/3R function (see Table 4-3) are shown in Figure 4-4.
CLIP module incorporates both clocked (3R) and unclocked (2R) data regeneration. You can set the mode of operation (2R or 3R) using the 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 CLIP with 2R/3R function (see Table 4-3) is software-configurable for unprotected or fiber protected operation. For more information about the 3R CLIPs versions, refer to the Cisco ONS 15200 Module Handbook R.1.1.
The 2R/3R CLIPs are available in two dispersion tolerances: 1800 ps/nm at +7 dBm, and 3000 ps/nm at 0 dBm.
The CLIP module can be installed in slots 1 to 16.
The unprotected configuration is software-defined. In the hardware, all boards are equivalent in terms of protection.
Older, pure 3R clips with split ratio 0/100 should be attached to port A as no receiver resides behind port B.
3R unprotected CLIPs with split ratio of 0/100 should be attached to port B.
In MCUs, use the LED indicators on the Network Adaptation module (NAM) to monitor CLIP operating parameters. (See "Network Adaptation Module.") In 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.
Table 4-1 CLIP LED Indicators (NAM and SCU)
| LED | Orientation | Condition (When Lit) |
|---|---|---|
Indicate active (A) and standby (S). |
This section provides optical, electrical, environmental and mechanical specifications for the CLIP module. Default thresholds are also included.
Table 4-2 lists optical operating frequencies.
Table 4-2 CLIP Module Operating Frequencies for 2R/3R CLIPs of Release 2.0 of the ONS 15200
| Channel Number | Frequency (THz) | Wavelength (nm) | Remarks |
|---|---|---|---|
 |
Note The DWDM side (TxTP) has 1800-ps/nm dispersion tolerance with a 2.5-dB penalty for long reach (+7 dBm), and a 3000-ps/nm dispersion tolerance with a 2.0-dB penalty for very long reach (0 dBm). |
The CLIP faceplate is printed with the following information:
For example, if the faceplate is printed with V/2R/CH12, the range of the CLIP is very long, the data regeneration type is unclocked, and the ITU channel number is 12.
The CLIPs are available in four different versions. (See Table 4-3.)
| Function | Dispersion Tolerance | DWDM Side Optical Output Power |
Range/Short Form | Remarks |
|---|---|---|---|---|
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Note The 2R function retransmits the optical signal with electrical reamplification and reshaping but without retiming. The 3R function reamplifies, reshapes, and retimes the optical signal. |
At maximum operating temperature and input voltage, the CLIP module consumes 8 watts at most.
Table 4-4 lists CLIP environmental specifications during normal operation.
Table 4-4 CLIP Environmental Specifications
| Item | Specification |
|---|---|
Short term operating temperature |
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Short term operating relative humidity (per Telcordia GR-63-Core, NEBS level 3) |
The default thresholds follow:
The optical transmitter output level (toward the DWDM line) is 0 dBm (nominal) for medium range (earlier clip version), +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 4-6.
Temperature and current characteristics for the CLIP module are listed in the next five tables. The bias currents specified are at calibration time.
Table 4-7 CLIP Peltier Current
| Threshold | Percentage of Maximum Current |
|---|---|
Table 4-8 CLIP Board Temperature
| Threshold | Degrees Celsius |
|---|---|
Table 4-9 DWDM Laser Temperature Deviation
| Threshold | Degrees Celsius |
|---|---|
Table 4-10 DWDM Laser Bias Current
| Threshold | Percentage of Calibration Current |
|---|---|
Table 4-11 Client Laser Bias Current
| Threshold | Percentage of Calibration Current |
|---|---|
Table 4-12 lists the physical dimensions of the CLIP module.
This section explains how to remove and replace the CLIP module for protected and unprotected channels. This module is used in both the ONS 15252 MCU and the ONS 15201 SCU. Figure 4-4 shows 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. Install an unprotected CLIP module with a NAM that has a splitting ratio of 100/0 or 0/100.
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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. |
To replace the CLIP module, complete the following procedures:
1. Remove a Protected Client Layer Interface Port Module
2. Remove an Unprotected Client Layer Interface Port Module
3. Replace the Unprotected or 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 data rate is STM-16/OC-48. To modify the settings, use the Cisco ONS 15200 Web Interface Software User Manual.
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.
Use this section when a 3R CLIP with unprotected function is installed. (Hardware Release 1.0 and 1.0.1)
Before removing a CLIP module, you should retrieve and write down the data rate, settings for the CLIP module using the ONS 15200 web-based interface Path Summary screen. The default setting for data rate is STM-16/OC-48. To modify the settings, see the Cisco ONS 15200 Web Interface Software User Manual.
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.
The following paragraph describes the replacement procedures for CLIP modules for both protected and unprotected channels. The replacement procedure is the same for both unprotected and protected CLIP modules.
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 CSM (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 CSM.
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 CSM.
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 Set the NCB as the primary or secondary manager to manage the CLIP.
Step 21 Check the switchmode, data rate, protect/unprotected mode and FDI enabled/disabled settings of the 2R/3R CLIP and make sure they are as intended. To modify the settings, see the Cisco ONS 15200 Web Interface Software User Manual or the Cisco ONS 15200 Command Line Interface Manual.
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Note Unprotected 3R CLIPs must be replaced by protected 2R/3R CLIPs. The unprotected functionality is taken care of by the software, by setting the parameter protection to no. |
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Note Unprotected 3R CLIPs that have a splitting ratio 0/100
previously had to have the DWDM line signal attached to the A side receiver (as there was no receiver
on the B side). The new protected 2R/3R CLIP should have the DWDM signal attached to the B side
with splitting ratio 0/100. The unprotected functionality is taken care of by the software See also "Remove an Unprotected Client Layer Interface Port Module" section. |
The EEPROM holds important information about identity, parameters, and calibration constants. The EEPROM has a size of 16 K and a serial interface.
Posted: Thu Apr 17 15:18:42 PDT 2003
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