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SSU 2000 FAQs

 
Q1: How do you perform a SSU 2000 firmware upgrade and which software or application do you use?
Q2: How do you perform a firmware upgrade to the PackeTime NTP and PackeTime PTP modules and which software or application do you use? Provide detailed steps, including hardware connection, and any additional 3rd party software required.
Q3: How do you provide protection on the output modules of a SSU 2000 shelf?
Q4: How many input modules can be installed in a SSU 2000/SSU 2000e system? How many GPS modules can be installed in a SSU system?
Q5: What is the difference between the SSU2000 and SSU2000e shelves? How are the modules different between the two shelf platforms?
Q6: How many telnet users can be logged onto the unit at the same time, and how many ICS users can be logged on to the unit at the same time?
Q7: How many physical electrical/optical ports are on the PackeTime NTP and PackeTime PTP modules?
Q8: Which external or 3rd party application do you use to monitor PTP and NTP packets?
Q9: What are the necessary steps to configure the PackeTime PTP module to communicate with a slave?
Q10: How many expansion shelves can be added to the SSU 2000 main shelf? What are the necessary steps to hook up the expansion shelves?
Q11: What do the SOURCE LEDS A, B, C, D reference to on the output modules?
Q12: If an input or output module STATUS LED is blinking amber, what does it mean?
Q13: If the LINK A LED on a PackeTime PTP module is blinking green, what does it mean? If it is blinking amber, what does it mean?
Q14: If a user has no manual, and is installing and configuring the unit for the first time, what should a person do to try to configure the system alone without any external help?
Q15: Can all input and output modules be inserted into both the SSU2000 and SSU2000e shelves? If not, what are the limitations?
Q16: What software in installed in each input and output module?
Q17: Using the ICS command set, how do you look up the hardware, software, and configuration of each module?
Q18: Which module is used only in the expansion shelves?
Q19: When configuring IP addresses for the service ports and management ports on the PackeTime NTP and PackeTime PTP modules, what are the limitations on IP addresses?
Q20: Where are the service ports and management port located?
Q21: What does the OSC-A and OSC-B on the back of the SSU 2000 main shelf do and what does it output?
Q22: How many versions of the Comms module are there and how are they different hardware-wise?
Q23: When installing GPS, what is the maximum cable length? If the installation calls for longer runs, what should the installer do to meet the cable length requirements so that the GPS signal is stronger?
Q24: If a user had to perform a cutover and observe phase alignment using a SSU2000 system, what cards should be used in the SSU2000 to perform this task?
Q25: Does the PackeTime NTP module or the PackeTime PTP module have a probe feature?
Q26: What signals are provided from the JSW output module?
Q27: What is the maximum number of clients that can be supported by the PackeTime PTP module?
Q28:2What is the ICS command to view all past alarms?
Q29: If a user can no longer log into the system because the username or password is incorrect, what can the user do at this point?
Q30: When changes are made to the PackeTime NTP or PackeTime PTP modules, what must the user do before settings are activated?
Q31: On a DS1 or E1 input module, can only DS1 or E1 signals be accepted by their respective cards?
Q32: What are the operating modes for the SSU 2000 system?
Q33: What is the meaning of PQL and how does it work in the SSU 2000 system?
Q34: Can a signal be monitored only and not be used as a system reference? If yes, how do you do that? If no, what else can you do to make this happen?
Q35: When a module is physically removed from a shelf, what must one do before inserting a card of a different type into that same slot?
Q36: During a firmware upgrade, what is recommended to be done to observe that the upgrade is completed?
Q37: What should a user refer to ensure that the latest firmware is being upgraded?
Q38: What might happen when new PackeTime PTP modules are inserted into a shelf with older firmware that does not support these PackeTime PTP modules?
Q39: Firmware upgrades on the SSU2000 can be time consuming. What must the user observe and how much time is typically allotted to perform a complete system upgrade?
Q40: If an installer has no external measurement tools, how does one verify that the output signals are the correct framed signals?
Q41: How do you make an installed output card into a redundant output card such that any changes made on the installed card, are reflected on the redundant card?

Q1: How do you perform a SSU 2000 firmware upgrade and which software or application do you use?
A: There are two recommended methods to perform a SSU 2000 firmware upgrade and the user can use either the TimeCraft GUI application, or the SSU 2000 Downloader application that runs on MS-DOS Download. It is recommended that the user open a separate telnet session during the download process to monitor the download progress and to verify completion.

1st Method: TimeCraft allows the user to perform a firmware upgrade using either a serial or Ethernet connection for most modules. The exception is the PackeTime NTP and PackeTime PTP modules which can only be upgraded using an Ethernet connection.


2nd Method: The Downloader application can only run in a MS-DOS environment over a Telnet session. The Downloader application does not support a serial firmware download. To execute the program in MS-DOS mode, type ssudwnld. The Downloader application will provide assistance on using the proper syntax for downloading firmware.

NOTE: Before downloading over an Ethernet connection, verify that the IP address of the SSU 2000 can be pinged successfully, and that the username and password allows login access to the unit.
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Q 2: How do you perform a firmware upgrade to the PackeTime NTP and PackeTime PTP modules and which software or application do you use? Provide detailed steps, including hardware connection, and any additional 3rd party software required.
A: The following are guidelines and procedures for upgrading the PackeTime NTP and PackeTime PTP module:

  1. When installing firmware into the PackeTime NTP and PackeTime PTP modules, a maintenance port adapter must be inserted at the rear of the SSU 2000 shelf.
  2. Ensure that the maintenance port adapter is connected to the network with an Ethernet cable.

    Note: The Ethernet port of the maintenance port adapter cannot be pinged.
  3. Downloading the NTP and PackeTime PTP module firmware requires an FTP server. If downloading from a local PC, use an application such as FileZilla.
  4. The user should know the path where the file is stored on the server.
  5. Execute the UPGRADE ICS command.

    The following is an example of using the UPGRADE ICS command with the FileZilla application. The FTP Server IP address is 192.119.2.10

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Q3: How do you provide protection on the output modules of a SSU 2000 shelf?
A: To provide redundant output protection on a rear access shelf, a summer is required to be inserted on the back of the paired slots. On the back of the shelf, stenciling indicates which slots can be paired which requires that identical cards be inserted in those respective slots. For instance slots I/O-6 and I/O-7 are paired, but I/O-7 and I/O-8 cannot be paired as indicated by the stenciling.
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Q4: How many input modules can be installed in a SSU 2000/SSU 2000e system? How many GPS modules can be installed in a SSU system?
A: For a SSU 2000 system, one to nine input modules can be installed. Of the nine input modules, one to two slots can be used for a GPS module.

For a SSU 2000e system, one to three input modules can be installed. Of the three input modules, one to two slots can be used for a GPS module.
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Q5: What is the difference between the SSU2000 and SSU2000e shelves? How are the modules different between the two shelf platforms?
A: The SSU 2000 shelf has input and output connections on the rear of the shelf. Interconnect cables from the SCSI connectors at the rear mate with external mounted input and output panels to provide access points to insert input signals, or take output timing signals to NEs.

The SSU2000 shelf has a small height footprint compared to the SSU2000e shelf. The SSU2000e shelf is a front access shelf where all input and output connectors are permanently attached to the front of the shelf.
Most of the input and output modules can be inserted in either type of shelves; the only exception is the LRM modules (Retimer modules) which can only be used in the SSU2000 shelf, not the SSU2000e shelf.
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Q6: How many telnet users can be logged onto the unit at the same time, and how many ICS users can be logged on to the unit at the same time?
A: A maximum of four telnet users can be logged into the SSU2000 system at the same time, and a maximum of four ICS users can be logged into the SSU2000 system at the same time.
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Q7: How many physical electrical/optical ports are on the PackeTime NTP and PackeTime PTP modules?
A: On the PackeTime NTP modules, there are two physical ports that accept either optical or Ethernet connections for the service ports. These ports are located on the front of the module.

On the PackeTime PTP modules, there is only one physical port for the service port that accepts either optical or Ethernet connections. This port is located on the front of the module.
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Q8: Which external or 3rd party application do you use to monitor PTP and NTP packets?
A: Because the PackeTime NTP and PackeTime PTP modules output packetized data, the most common application to use is Wireshark. This application is free, and can be downloaded from the Wireshark Web site.
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Q 9: What are the necessary steps to configure the PackeTime PTP module to communicate with a slave?
A: To set up the PTP blade for GM operation, perform the following steps:
  1. Assign an IP address to the PTP PackeTime module.
  2. Assign any VLAN ID if being used.
  3. Set the service port speed.
  4. Set the CLOCK ID, Domain, TOD-source (GPS or ARB), and the maximum number of clients supported.
  5. Set the Sync, Announce, and Delay Message rate.
  6. Enable the PTP operation.
  7. Finally, use the COMMIT operation to initialize and store the values.

See the SSU/SDU 2000 or SSU/SDU 2000e user guide for details.
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Q10: How many expansion shelves can be added to the SSU 2000 main shelf? What are the necessary steps to hook up the expansion shelves?
A: A total of four expansion shelves can be added to the main shelf.

Connecting SDU-2000 Expansion Shelves
To connect a single SDU-2000 to the SSU-2000 main shelf, use the following procedure:
  1. Attach one end of the Expansion Cable (part number 12013050-xxx-0; the xxx indicates
  2. Attach the other end of the Expansion Cable to either J17 or J15 on the rear panel of the SDU-2000.

    Note: If you are installing only one SDU-2000, then attach the Expansion Terminator to either J15 or J17, whichever is available.
  3. Attach one end of the Backup Clock cable (part number 12013115-xxx-0; the xxx indicates the length of the cable) to J9 on the rear panel of the SSU-2000.

    Caution: To avoid damage to the J9 connector or the BNO tee connector, be sure to align its internal pins with the mating connector. The tee connector does not rotate once it is installed. If J9 is damaged, you will have to replace the entire shelf.
  4. Install a BNO tee connector (part number 551095-0001) on J16 on the rear panel of the SDU-2000.

    Caution: To avoid damage to the BNO tee connector, be sure to align its internal pins with the mating connector. The tee connector does not rotate once it is installed. If J16 is damaged, you will have to replace the entire shelf.
  5. Caution: To avoid damage to the BNO tee connector, be sure to align its internal pins with the mating connector. The tee connector does not rotate once it is installed. If J16 is damaged, you will have to replace the entire shelf.
  6. If this shelf is the only expansion shelf to be installed or is the last expansion shelf in the chain, set the SDU Backup CLK Termination Switch (S2) to the "120 Ohms" position. Otherwise, set the SDU Backup CLK Termination Switch (S2) to the "Open" position.
  7. Set the SDU Shelf Address on Switch S1 to match the expansion shelf number.

    For example:
    • If using Expansion Shelf #1; set the S1 Switch to Shelf Address 2
    • If using Expansion Shelf #2; set the S1 Switch to Shelf Address 3
  8. If there are additional expansion shelves to be installed, repeat steps 1 through 7.
  9. On the last expansion shelf, set the SDU Backup CLK Termination Switch (S2) on the rear panel of the SDU 2000 to the "120 Ohms" position.
  10. Attach the SSU Expansion Terminator (part number 12013049-000-0) to either J15 or J17 on the very last expansion shelf in the chain.

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Q11: What do the SOURCE LEDS A, B, C, D reference to on the output modules?
A: SOURCE A, B, C, and D LEDs refer to the source that is driving the outputs. The source is indicated on each output module with a solid green LED. A solid amber LED indicates a fault from the output module's source. SOURCE A refers to CLOCK-A (slot 1A1), SOURCE B refers to CLOCK-B (slot 1A12), SOURCE C refers to an input module (such as a DS1, E1 input module, but excludes the GPS module), and SOURCE D refers to the expansion shelf
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Q12: If an input or output module STATUS LED is blinking amber, what does it mean?
A: A module with a STATUS LED that is blinking amber indicates that the module is disabled for service.
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Q13: If the LINK A LED on a PackeTime PTP module is blinking green, what does it mean? If it is blinking amber, what does it mean?
A: When the LINK A LED is blinking green, the Ethernet speed is operating at 1 GB/s. When the LINK A LED is blinking amber, the Ethernet speed is 100 MB/s
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Q 14: If a user has no manual, and is installing and configuring the unit for the first time, what should a person do to try to configure the system alone without any external help?
A: One way to get access to SSU 2000 documentation is to go to Symmetricom's Web site. If you need to install and configure the unit, and you do not have access to the system, log into the system and use the user-friendly ASCII ICS commands to configure the system. A help system is in place to guide the user. Once a user is logged on, typing HELP, or HELP will provide the user with ICS command examples for provisioning the shelf.
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Q15: Can all input and output modules be inserted into both the SSU2000 and SSU2000e shelves? If not, what are the limitations?
A: In most cases, the input and output modules can be inserted in both type of shelves. The only exception is the LRM modules (aka Retimer modules) which can only be used in the SSU2000 shelf, not the SSU2000e shelf.
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Q16: What software in installed in each input and output module?
A: Most of the input and output modules have two active firmware files loaded; the module firmware and the FPGA firmware. The module firmware has a DN1 file extension, and the FPGA firmware has a DN9 file extension.

Note: Only the PackeTime NTP and PackeTime PTP modules have a single module firmware file. The firmware file for these modules has an .rpm file extension.
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Q17: Using the ICS command set, how do you look up the hardware, software, and configuration of each module?
A: See the following:
  • To view the hardware configuration of all modules, use the "config" ICS command.
  • To view the software configuration of all modules, use the "config sw" ICS command.
  • To view the configuration of each individual module including the FPGA code, use the "conf xAy" ICS command, where x = the shelf number, and y = the slot number.

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Q18: Which module is used only in the expansion shelves?
A: The only module that is only used in the expansion shelves (not main shelves) is the Buffer module (PN 23413122-000-0). Two buffer modules can be inserted in the last two slots at the far right end of the expansion shelf.
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Q19: When configuring IP addresses for the service ports and management ports on the PackeTime NTP and PackeTime PTP modules, what are the limitations on IP addresses?
A: When configuring the service ports and the management ports of the PackeTime NTP module or PackeTime PTP module, the service ports and management ports must be on a different subnet, which means that the 3rd octet must be different.
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Q20: Where are the service ports and management port located?
A: The service ports are located on the front of each module, whereas the management port is located at the rear of the SSU 2000 shelf using a maintenance port adapter.
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Q21: What does the OSC-A and OSC-B on the back of the SSU 2000 main shelf do and what does it output?
A: The OSC-A and OSC-B provide a Freerun (untrained) 10 MHz output from the clock modules that can be used for testing.
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Q22: How many versions of the Comms module are there and how are they different hardware-wise?
A: There are six versions of the Comms module as shown in the following table:
Comms Module Description Version Number
SSU-2000 S/W Basic 24113012-000-0
SSU-2000 S/W Basic w/NTP 24113012-001-0
SSU-2000 S/W Basic w/SNMPv2 24113012-002-0
SSU-2000 S/W Basic w/NTP & SNMPv2 24113012-003-0
SSU-2000 S/W Basic w/SNMPv3 24113012-004-0
SSU-2000 S/W Basic w/NTP & SNMPv3 24113012-005-0


All Comms modules are firmware configurable. The hardware, boot code, and PLD object are the same for the six versions. However, the firmware associated with each of the six versions is different. Consult the SRN for the Comms module version that you are using for specific firmware version information.
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Q23: When installing GPS, what is the maximum cable length? If the installation calls for longer runs, what should the installer do to meet the cable length requirements so that the GPS signal is stronger?
A: The maximum cable length is 1000 feet (300m). To adjust cable length requirements, Symmetricom offers cables as well as higher-gain antennas to meet the cable run requirements as shown in the following table:
GPS Antenna Kits
GPS Roof Mount Part Number
Antenna Kit 6M 26dB Antenna 990-13091-006
Antenna Kit 13M 26dB Antenna 990-13091-013
Antenna Kit 33M 26dB Antenna 990-13091-033
Antenna Kit 48M 26dB Antenna 990-13091-048
Antenna Kit 70M 40dB Antenna 990-13073-070
Antenna Kit 120M 40dB Antenna 990-13073-120
Antenna Kit 150M 48db Antenna 990-13074-150
Antenna Kit 180M 48dB Antenna 990-13074-180
Antenna Kit 230M 48dB Antenna/20dB Amp 990-13075-230
Antenna Kit 300M 48dB Antenna/20dB Amp 990-13075-300

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Q24: If a user had to perform a cutover and observe phase alignment using a SSU2000 system, what cards should be used in the SSU2000 to perform this task?
A: When cutting over from one shelf to another to either upgrade the new shelf or replace a defective shelf, you must connect the CC output module on t
 
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