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This chapter describes procedures for:
- Installing cables onto the TSR II system, including information on customer supplied cables
- Setting the number and position of the TSR II bays
Customer Supplied Cables
Customer supplied cables are those cables that connect the TSR II bay modules to the customer's equipment. All customer supplied cables must be available at the time of installation. Refer to Figure 5-1 for a list of customer supplied cables.
Avici Supplied Cables
Avici includes a kit of external cables (for use in troubleshooting) with each bay. These cables allow console access into each of the TSR II bay components.
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Ethernet Cable Specifications
The Ethernet cables required include the 10BaseT used for RJ-45 connections to the network management station. This straight through connector is a standard Category 5 patch cable. Maximum cable length is 100 meters.
Fiber Cable Routing
Single or multi-mode optical fiber cables interface between router module and customer equipment.
The fiber optic cables route to internal vertical cable channels and horizontal cable trays on the front surface of the TSR II system. The cables route up or down each side of the bay and are distributed between the shelves to router modules.
This method of fiber cabling allows you to remove a module without interfering with the operation of any other module.
Fiber Management Frames
The customer is responsible for purchasing and installing the fiber management frame for their fiber optic cables.
We recommend Siecor Fiber Management System for overhead cable routing of multiple system configurations. Refer to the TSR II Site Preparation Guide for detailed information on fiber management.
Installing Module Cables
The router modules ship separately from the TSR II bay, please refer to the documentation that is packed with your router for cabling information.
Installing Route Controller Module Cables
The sever module ships separately from the TSR II bay, please refer to the documentation that is packed with your route controller for cabling information.
TSR II:RS-232 Serial Interface Connector
A DB-9 RJ-45 adaptor is required to connect the route controller console port on the bay controller to a console terminal. The route controller RS-232 connector is a 9-pin DB-9 female connector supporting a limited data communications equipment (DCE) pinout (see Figure 5-1.).
PROCEDURE: Use the following steps to connect the route controller console port to a console terminal:
Step 1 Attach a DB-9 RJ-45 adapter from this connector on the route controller module to one end of the shielded cable with RJ-45 connectors on each end.
Step 2 Take the RJ-45 connector on the other end of the shielded cable and plug it into the female adapter.
Step 3 Plug the female adapter into the console terminal (PC) port.
Figure 5-1. Serial Cable
RS-232 supports the following terminal settings:
- Bits: 8
- Parity: N
- Stop bit: 1
- Flow control: None
- Speed = 9600 BAUDS
Figure 5-2. View of Front of Bay Controller showing DB-9 connector
Installing Bay Controller Backplane Cables
The TSR II bay controller backplane is attached to the bay frame at the rear of the bay. The TSR II bay controller backplane interfaces between:
- Bay controllers and cooling modules
- Bay controllers and module backplanes (for communication between route controller and router modules)
- Bay controllers and the BIP (for monitoring power and alarm LEDs)
- Bay controllers in adjacent bays (multiple bay systems only)
Ethernet Cables
The bay controller backplane Ethernet connections connect to the route controller via the bay controller connections. These connections are on the route controller connector panel directly between shelves 2 and 3.
The cables used to connect the bay controller backplane to the Ethernet connections on the route controller interconnect panel are installed during manufacturing. However, if there is ever a need to replace or service these cables, the following table indicates where the cables should interconnect.
To access these connections, the sever connector panel cover (between front of shelves 2 and 3) must be opened. The bay controller backplane protective cover assembly must also be removed to access the rear of the bay controller backplane (see Figure 5-4 and Figure 5-5 for further information).
Figure 5-3. Backplane Cover Warning Label
Figure 5-4. Bay Controller Backplane Ethernet and Other Major Connections
Figure 5-5. Route Controller to Bay Controller Connections at Route Controller Connector Panel (cover down)
Bay Numbering
The bay controller backplane includes a rotary switch and a toggle switch for setting the number and position of each TSR II bay. For more information refer to the Terabit Switch Router Series II Install Guide (Multi-Bay).
There are two switches on the bay controller backplane for this purpose:
- The toggle switch specifies whether this bay is in the front or back row (0 or 1) of a Multi-bay lineup.
- The rotary switch specifies the number of the bay in a Multi-bay lineup.
Table 5-4. Bay Numbering Chassis Toggle (SW1) Rotary (SW2) First Bay
0
1
Second Bay
1
2
See Figure 5-6.
PROCEDURE: Use the following steps to set the bay identifier switches for an front bay location:
Step 1 Set toggle switch to "0" (0 =front)
Step 2 Set bay number SW1 rotary switch to "1."
Figure 5-6. Bay Controller Toggle and Rotary Switches
Grounding Communication Links
The TSR II system uses three main types of communications cables:
- Fiber-optic cables
- Twisted-pair Ethernet cables
- Coaxial cables
CAUTION (C:5-1) Risk of service interruption or equipment damage. In a system with an Isolated Bonding Network (IBN) grounding topology, take care that communications cables going into and out of the system do not violate the topology. Links must be isolated to avoid signals being referenced to different ground potentials that can cause signal errors or damage to circuitry. Safety hazards can arise when metallic connections allow contact between different ground potentials.
Potential differences can occur when signals and/or shields are connected to different ground references. This requires specific installation measures to offset possible risks or violations.
NOTE The installation measures that must be taken to eliminate different ground references are beyond the control of the supplier of the equipment or the installer. These measures are in reference to the grounding topology of the customer's central office. Customers have different methods of supplying and connecting these site specific grounds. This statement is intended only as a reminder to customers that there are possible risks involved when connecting to different ground sources.
For additional information on grounding network-communication links, refer to the International Telecommunications Union standards ITU-TS.
Central Office Alarms
This section provides a description of "Central Office Alarms" for the TSR II. These alarms set off audible and visual indicators in the Central Office (CO), as well as bay LEDs, see Figure 5-7.
Central office alarms, when connected at the CO, report the occurrence of events such as a component failure. Alarms originate in either a bay controller or route controller.
The alarm task resides in the bay controller and is responsible for setting and clearing of alarms as well as maintaining an alarm database. A DB-15 connector ("CO Alarm Connector") on the TSR II bay, located on the rear of the Breaker Interface Panel (BIP) provides you with the ability to connect the visual and audible alarms to your central office system.
CO Alarm Levels
There are three levels of central office alarms:
- Critical
- A critical alarm indicates the occurrence of a severe, service-affecting condition and requires immediate corrective action. Two Bellcore examples of a Critical alarm would be either a fire or an access transport entity (DLC), which must generate a critical alarm if 128 access lines are out of service.
- Major
- Major alarms indicate serious hardware or software conditions such as disruption of service or failure of an important circuit. A major alarm requires immediate attention to restore full system performance, but has less immediate impact on service or system operation than a critical alarm. Bellcore's example for a Major alarm, is a Public Packet Switch Network (PPSN) trunk "declared link failure."
- Minor
- A minor alarm indicates the problem does not have a serious affect on service to customers or indicates trouble with a circuit that is not essential to system operation. Bellcore's example of a Minor alarm would be all non-service affecting issues, such as, a line carrier problem where transmission was switched to a protection line.
Bellcore GR-474-CORE states that each trouble requiring a crafts person action shall result in an alarm condition and shall be reported by three concurrent methods:
CO Alarm LEDs and Audible Bells
The CO alarms are both visual and audible. Three labeled LEDs located on the TSR II bay BIP front panel visually display alarms signals. The CO alarms display is in the center of the panel. See Figure 5-7.
Figure 5-7. Central Office Alarm Panel LEDs
On the TSR II, the critical and major LEDs are red; the minor LED is amber. LEDs remain lit until all detected events have been cleared.
Whether the alarm signal originates from the route controller or bay controller, the appropriate LED, or visual and sound combination in the central office will activate. Logging of messages occurs when an alarm is activated.
IPriori provides CLI commands to silence alarms that are sounding, to display alarms, and to test the TSR II bay LEDs. For more information about IPriori and CLI commands for the CO alarms, see "IPriori Configuration Guide."
Installing Central Office Alarm Cables
Central office alarm cables route to the TSR II bay using customer supplied alarm cables. The alarm cables connect to the TSR II bay via a D-type, 15-pin connector. The DB-15 connector is located on the back of the BIP subassembly (see Figure 5-8).
Figure 5-8. CO DB-15 Alarm Connector
PROCEDURE: Use the following steps to connect the central office alarm to the TSR II:
Step 1 Remove the BIP cover by pulling carefully on the top edge of the cover.
Step 2 Attach the DB-15 central office alarm cable to the alarm out CO Alarm connection the rear of the BIP on the left side (see Figure 5-8 "CO DB-15 Alarm Connector).
Step 3 In the event you need to isolate the customer alarm system from the TSR II during service or repairs, bypass the alarm by inserting a switch between the alarm cable and the alarm system. Be sure to reset the switch to the ON position after completion of the service or repair.
For long cables, ensure that your alarm system is not impeded by cable resistance.
Configuring Central Office Alarm Cable Connections
The TSR II has three sets of relays to generate central office alarms. When connected at the CO, the relays provide audible (bells, chimes, gongs) and visual (red, amber) indicators in the CO (see Figure 5-9 for the pinout).
Figure 5-9. DB-15 Pinout
Normally CLOSED/OPEN refers to the un-energized relay position.
If no power is supplied to the bay controller:
Critical_LED_Normally_Closed will be shorted to Critical_LED_Common pin.
Critical_Alarm_Normally_Closed will be shorted to Critical_Alarm_Common_Pin.
Under normal power and operating conditions: Critical_LED_Normally_Closed will be open to Critical_LED_Common pin.
Critical_Alarm_Normally Closed will be open to Critical_Alarm_Common pin.
If an alarm condition occurs the "Alarm Cutout" push button located on the BIP will deactivate the Critical, Major, and Minor alarm (Klaxtron) relays while leaving the LED relays active. The LED relays will remain activated until the fault condition is cleared by software. All relay contacts are capable of maximum current rating of 2A at 30 Vdc, 0.5A at 115VAC.
Reinstalling EMI Covers
After installing and cabling modules, reinstall the EMI covers on the TSR II bay.
No hardware is necessary to attach the shelf cover to the bay. Small notches on the inside lip of the cover slip over attachment screws on the bay. The cover then pivots and clips onto the bay.
PROCEDURE: Use the following procedure to reinstall the EMI shelf covers:
Step 1 Position the notches on the inside top of the EMI cover onto the two protruding screws on the bay frame and slide the shelf cover onto the screws (see Figure 5-10).
Step 2 Pivot the shelf cover towards the bottom of the shelf and snap it into place (see Figure 5-10).
Figure 5-10. EMI Shelf Cover Reinstallation
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Copyright © 2006
Avici Systems Inc.
Avici® and TSR®
is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR™ are
trademarks of Avici Systems Inc.
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Last Updated: 12/08/06 at 10:59:06