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Table Of Contents
1.2.1 Reversible Mounting Bracket
1.3 Power and Ground Description
1.5 Cable Description and Installation
1.5.3 Cabling Sequence and Location
1.5.4 Fiber Cable Installation
1.5.5 Coaxial Cable Installation
1.5.7 Alarm Cable Installation
1.10.4 Cisco Transport Controller
1.10.13 Environmental Specifications
Shelf Assembly Hardware
This chapter provides a description of Cisco ONS 15327 shelf and backplane hardware. Card and cable descriptions as well as instructions for installing equipment are provided in the Cisco ONS 15327 Procedure Guide.
Chapter topics include:
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Power and Ground Description
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Warning
Warning
Warning
Warning
Note
Note
1.1 Installation Overview
When installed in an equipment rack, the ONS 15327 assembly is typically connected to a fuse and alarm panel that provides centralized alarm connection points and distributed power for the ONS 15327. Fuse and alarm panels are third-party equipment and are not described in this documentation. If you are unsure about the requirements or specifications for a fuse and alarm panel, consult the documentation for that product.
You can mount the ONS 15327 in a 19- or 23-inch rack. Including the fan-tray assembly, the shelf assembly weighs approximately 15 pounds without cards installed and 27 pounds fully loaded. An ONS 15327 is installed in a rack using reversible mounting brackets on each side of the shelf.
You can access the ONS 15327 cards, cables, connectors, power feeds, and fan-tray assembly through the front of the shelf assembly only. The CRIT, MAJ, MIN, and REM alarm LEDs visible on the XTC faceplate indicate whether a Critical, Major, Minor, or Remote alarm is present anywhere on the ONS 15327 assembly. These LEDs help you to determine quickly if any alarms are present on the assembly.
The ONS 15327 is powered using -48 VDC power. Positive and negative power terminals are accessible on the front panel.
Warning
Note
Install the ONS 15327 in compliance with your local and national electrical codes:
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Warning
1.2 Rack Installation
Warning
The ONS 15327 is easily mounted in a 19- or 23-inch equipment rack. The shelf assembly projects 2 inches from the front of the rack. It mounts in both EIA-standard and Telcordia-standard racks. The shelf assembly is a total of 17 inches wide with no mounting ears attached. With the mounting ears attached, the shelf assembly is 19 inches wide.
The ONS 15327 measures 5.1 inches high, 19 or 23 inches wide (depending on which way the mounting ears are attached), and 11 inches deep (13 x 48.3 x 28 cm). Figure 1-1 shows the dimensions of the ONS 15327 shelf assembly.
Figure 1-1 ONS 15327 Shelf Assembly Dimensions
1.2.1 Reversible Mounting Bracket
Caution
Caution
The shelf assembly comes with mounting brackets that can be reversed for use with a 19- or 23-inch rack ( Figure 1-2).
Figure 1-2 Reversing the Mounting Brackets (23-inch Position to 19-inch Position)
1.2.2 Mounting a Single Node
Mounting the ONS 15327 in a rack requires a minimum of 5.2 inches of vertical rack space (plus 1 inch for air flow). To ensure the mounting is secure, use two to four #12-24 mounting screws for each side of the shelf assembly. Figure 1-3 shows the rack mounting position for the ONS 15327.
Figure 1-3 Mounting an ONS 15327 in a Rack
1.2.3 Mounting Multiple Nodes
Most standard seven-foot racks can hold 12 ONS 15327s and a fuse and alarm panel.
1.3 Power and Ground Description
This section describes how to connect the ONS 15327 shelf assembly to the power supply. Terminate the chassis ground to either the office ground or rack ground before you install the power. Use the grounding lug to attach the ground cable to the shelf assembly according to local site practice.
Warning
Warning
Ground one cable to ground the shelf assembly. Terminate the other end of the rack ground cable to ground according to local site practice.
If the system loses power or both XTC cards are reset, you must reset the ONS 15327 clock unless the node has been previously provisioned to use Simple Network Time Protocol (SNTP) to update the clock over the LAN.
Warning
Warning
Caution
Warning
Use the following wiring conventions:
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Note
The ONS 15327 has redundant -48 VDC power terminals on the Mechanical Interface Cards. The terminals are labeled PWR A and PWR B and are located on the far right-hand side of the MICs if you are facing the shelf assembly. Both MIC A and MIC B must be installed to create redundant power connections.
To install redundant power feeds, use four power cables and one ground cable. For a single power feed, only two power cables and one ground cable are required. Use #12 AWG cable and, to ensure circuit overcurrent protection, use a conductor with low impedance. However, the conductor must have the capability to safely conduct any fault current that might be imposed. Do not use aluminum conductors.
The MIC power connector is shipped with the fastening screws inserted but not tightened. The screws may have tightened due to vibration during shipping. Make sure the screws are loose before attempting to remove the connector.
Warning
Warning
Warning
Figure 1-4 shows the MIC power connector being removed.
Figure 1-4 Removing the MIC Power Connector
Figure 1-5 shows a power cable being inserted into the MIC power connector.
Figure 1-5 Inserting a Power Cable into the MIC Power Connector
Figure 1-6 shows the MIC power connector being installed.
Figure 1-6 Installing the MIC Power Connector
Figure 1-7 shows redundant power connected to an ONS 15327.
Figure 1-7 Redundant Power Connected to an ONS 15327
1.4 Ferrites
Place third-party ferrites on power cables to dampen electromagnetic interference (EMI) from the ONS 15327. Ferrites must be added to meet the requirements of GR 1089. Refer to the ferrite manufacturer documentation for proper use and installation of the ferrites.
1.5 Cable Description and Installation
This section describes fiber-optic, DS-3 (coaxial), DS-1 (Champ), and twisted-pair cables.
1.5.1 Cabling Types
ONS 15327 cables use cable guides at each side of the front of the shelf assembly to economize shelf space and facilitate cable management. The following types of cables are used with the ONS 15327:
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1.5.2 Cable Guides
The ONS 15327 has cable guides located on each side of the front of the shelf assembly (see Figure 1-8). The cable guides ensure that the proper bend radius is maintained in the fibers and that all other cables are properly routed. To remove cable guides, take out the screws that anchor them to the side of the shelf assembly.
Figure 1-8 Managing Front Panel Cables with Locking Cable Guides
For easier strain relief, you can also use the optional tie-down bar to secure the cables using tie-wraps or other site-specific methods.
Figure 1-9 shows the tie-down bar, the ONS 15327, and the rack.
Figure 1-9 Tie-Down Bar
1.5.3 Cabling Sequence and Location
The two cable management considerations are the sequence of cable installation and the location of cable routing. To maintain access to all of the connectors during cable installation, cables must be attached to the MICs in the following order starting with MIC A (the bottom MIC) and repeating for MIC B:
1.
2.
3.
4.
5.
After attaching all of the cables to the MICs, route the cables out through the bottom right cable guide and snap it closed. Tie wrap the cables according to local site practice. Leave enough slack to remove the fan-tray assembly and fan filter.
You do not need to connect cables for the XTC cards and traffic cards in any particular order. Route XTC cables through the top right cable guide. Route electrical and fiber-optic cables out through the corresponding cable guides on the left side of the shelf assembly. Figure 1-10 shows the order in which you should install cables on the ONS 15327.
Figure 1-10 Cable Installation Sequence
1.5.4 Fiber Cable Installation
Caution
ONS 15327 OC-12 and OC-48 cards have SC connectors and the OC-3 and G1000-2 cards have LC connectors. To install fiber-optic cables in the ONS 15327, a fiber cable with the corresponding connector type must be connected to the transmit and receive ports on the ONS 15327 cards (see Figure 1-11). On ONS 15327 OC-12 and OC-48 card ports, the left side connector is the transmit port and the right side connector is the receive port. Cisco recommends that you label the transmit and receive ports and the working and protection fibers at each end of the fiber span to avoid confusion with cables that are similar in appearance.
Warning
Note
Figure 1-11 Installing a Fiber-optic Cable
1.5.5 Coaxial Cable Installation
For DS-3 traffic the ONS 15327 uses coaxial cables and connectors. Cisco recommends connecting an RG-59/U cable to a patch panel; RG-59/U cable is designed for long runs of up to 450 feet. Use a compatible straight male BNC connector to connect the cable to the DS-3 ports on the MICs. The transmit (TX) ports on MIC A and the receive (RX) ports on MIC B use the same type of connector.
The electromagnetic compatibility (EMC) performance of the node depends on good-quality DS-3 coaxial cables, such as Shuner Type G 03233 D, or the equivalent.
Caution
Figure 1-12 shows how to connect a coaxial cable to the ONS 15327 MIC.
Figure 1-12 Installing a Coaxial Cable with BNC Connectors
1.5.6 DS-1 Cable Installation
DS-1 ports support AMP Champ connector cabling. Installing AMP Champ connector DS-1 cables requires 64-pin bundled cable connectors with a 64-pin male AMP Champ connector.
Cisco offers these DS-1 cables in various lengths (product # 15327-AMP-WW-30=, 15327-AMP-WW-50=, 15327-AMP-WW-100=, or 15327-AMP-WW-250=, lengths 30, 50, 100, or 250 feet, respectively), including a straight connector for use with the Cisco tie-down bar (product # 15327-TIE-BAR-19= or 15327-TIE-BAR-23= for 19-inch or 23-inch racks, respectively).
You need AMP Champ connector #552285-1 for the plug side and #1-552496-1 for the right-angle shell housing, or their functional equivalents. The corresponding 64-pin female AMP Champ connector on the MIC supports one receive (in) and one transmit (out) for each DS-1 port for the corresponding XTC.
Because each MIC DS-1 connection supports 14 DS-1 ports, only 56 pins (28 pairs) of the 64-pin connector are used. Prepare one 56-wire cable for each DS-1 connection. Table 1-1 shows the pin assignments for the Champ connectors on the ONS 15327 MICs.
Note
Note
Figure 1-13 shows DS-1 cable installation.
Figure 1-13 Installing a DS-1 Cable
1.5.7 Alarm Cable Installation
The alarm cables attach to the MICs using twisted-pair cables terminated with an RJ-45 connector on the end that plugs into the ALARM port. The other end of the cable plugs into the alarm-collection equipment. Terminate this end of the cable according to local site practice.
The pins on the ALARM port correspond to the six external alarm inputs and the two external alarm outputs (controls) that you can define using CTC. Alarms 2, 4, and 6 correspond to MIC A and alarms 1, 3, and 5 correspond to MIC B. Alarm output 1 corresponds to MIC B and alarm output 2 corresponds to MIC A. Table 1-2 shows the input alarm pinouts and the corresponding alarm numbers assigned to each MIC port. Table 1-3 shows the output alarm pinouts.
Table 1-2 Alarm Input Pin Assignments
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15
Alarm 2+
6
Alarm 2-
4
33
Alarm 1+
4
Alarm 1-
6
51
Alarm 0+
2
Alarm 0-
Table 1-3 Alarm (External Control) Output Pin Assignments
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17
Contact+
8
Contact-
Figure 1-14 shows RJ-45 pin numbering.
Figure 1-14 Pins 1 and 8 on the RJ-45 Connector
1.5.8 BITS Cable Installation
The BITS cables attach to the MICs using BITS clock cable, twisted-pair #22 or #24 shielded AWG wire terminated with an RJ-45 connector on the end that plugs into the BITS port. The other end of the cable plugs into the BITS clock. Terminate this end of the cable according to local site practice.
Each MIC has one BITS input and one BITS output. The BITS inputs and outputs have corresponding pins on the RJ-45 BITS ports. The BITS 1 inputs and outputs are on MIC A and the BITS 2 inputs and outputs are on MIC B. When connecting BITS cable to the ONS 15327, see Table 1-4 for the BITS cable pin assignments. Figure 1-15 shows the BITS In pins on the RJ-45 connector and Figure 1-16 shows the BITS Out pins on the RJ-45 connector.
Table 1-4 BITS Cable Pin Assignments
BITS 1 In
BITS 2 In3
BITS Input+
4
BITS Input-
BITS 1 Out
BITS 2 Out7
BITS Output+
8
BITS Output-
Figure 1-15 BITS In Pins on the RJ-45 Connector
Figure 1-16 BITS Out Pins on the RJ-45 Connector
1.6 Fan-Tray Assembly
Facing the front of the ONS 15327, the fan-tray assembly is located on the far right side. The fan-tray assembly is a removable drawer that holds fans and fan-control circuitry for the ONS 15327. After you install the fan-tray assembly, you should not need to remove it unless a fan failure occurs.
The fan-tray assembly has an air filter on the right side of the fan-tray assembly that you can install and remove by hand. Remove and visually inspect this filter every 30 days. For inspection procedures, see the ONS 15327 Procedure Guide. Spare filters should be kept in stock. If you are replacing the air filter, you must first move aside the cables that cross in front of it. You must install the air filter with its metal bracing against the fan-tray assembly.
Figure 1-17 shows the location of the fan tray air filter.
Figure 1-17 Fan-Tray Air Filter
Caution
Figure 1-18 shows the location of the fan-tray assembly.
Figure 1-18 Fan-Tray Assembly
1.7 Alarm Cutoff
Visual and audible alarms are typically wired to trigger an alarm light at a central alarm collection point when the corresponding contacts are closed. The alarm cutoff (ACO) function stops (turns off) the alarm signal being transmitted to the alarm collection point.
To activate the ACO function, press the ACO button on the XTC card faceplate. The ACO button clears all audible alarm indications. After clearing the audible alarm indication, the alarm is still present on the Alarms tab in Cisco Transport Controller (CTC) and appropriate action is needed to clear the alarm. For information about connecting to alarm collection equipment, refer to the Cisco ONS 15327 Procedure Guide.
1.8 Timing Installation
The ONS 15327 supports two Building Integrated Timing Supply (BITS) clock interfaces. The physical connection is provided through an RJ-45 connector on each MIC. Two pins on each RJ-45 are used for BITS timing. BITS 1 In (MIC A) and BITS 2 In (MIC B) use pins 3 and 4. BITS 1 Out (MIC A) and BITS 2 Out (MIC B) use pins 7 and 8. The BITS 1 pins support output and input from the first external timing device. The BITS 2 pins perform the identical functions for the second external timing device. Table 1-5 lists the pin assignments for the BITS timing pin fields. For more information about connecting BITS timing to the ONS 15327, refer to the Cisco ONS 15327 Procedure Guide.
Note
1.9 Cards and Slots
Caution
ONS 15327 cards have electrical plugs at the back that plug into electrical connectors on the shelf assembly backplane. When the ejectors are fully closed, the card plugs into the assembly backplane. Figure 1-19 shows the slot numbering.
Warning
Note
1.9.1 Slot Requirements
The ONS 15327 shelf assembly has eight card slots; four traffic card slots (Slots 1 to 4), two Cross-Connect, Timing and Control (XTC) slots (Slots 5 and 6), and two MIC slots (Slots 7 and 8). The wider slots host the XTC cards and MICs. The narrower slots host Ethernet, OC-3, OC-12, and OC-48 cards.
The XTC slots host both XTC-14 and XTC-28-3 cards. XTC cards are required for system operation. The MIC slots host MIC A and MIC B cards. The MIC slots are keyed to ensure that you install the MICs in the correct slot. Install MIC A in the bottom MIC slot (Slot 8) and MIC B in the top MIC slot (Slot 7). MICs are also required for system operation. Make DS-1 and DS-3 connections using the connectors on the MICs. Refer to Chapter 2, "Card Reference" for more information about ONS 15327 cards.
Table 1-6 lists the number of ports, line rates, connector options, and connector locations for ONS 15327 optical, electrical, and Ethernet interfaces.
1.9.2 Card Installation
The procedure for installing ONS 15327 cards is slightly different for each card. Before installing any XTC or traffic cards, install at least one MIC and apply power to the shelf assembly. First install MIC A in Slot 8. After successfully connecting the power to MIC A, install MIC B followed by the XTC cards. Install any traffic cards after you have successfully installed and turned up the XTC cards and MICs.
Figure 1-19 shows the location and number of each card slot.
Figure 1-19 ONS 15327 Slot Numbering
Note
Warning
Figure 1-20 shows XTC card installation.
Figure 1-20 Installing an XTC Card (XTC 28-3)
Figure 1-21 shows traffic card installation.
Figure 1-21 Installing a Traffic Card (E10/100-T)
Warning
1.10 Hardware Specifications
The following sections list the hardware specifications for the ONS 15327 shelf assembly.
1.10.1 Slot Assignments
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1.10.2 Cards
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1.10.3 Configurations
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1.10.4 Cisco Transport Controller
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1.10.5 External LAN Interface
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1.10.6 TL1 Craft Interface
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1.10.7 Modem Interface
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1.10.8 Alarm Interface
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1.10.9 Database Storage
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1.10.10 BITS Interface
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1.10.11 System Timing
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1.10.12 Power Specifications
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1.10.13 Environmental Specifications
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The FTA is required to fulfill environmental specifications.
1.10.14 Dimensions
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Posted: Mon Feb 25 06:52:00 PST 2008
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