Cisco ONS 15327 Reference Manual, Release 4.1
Chapter 1, Hardware
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Shelf Assembly Hardware

Table Of Contents

Shelf Assembly Hardware

1.1  Installation Overview

1.2  Rack Installation

1.2.1  Reversible Mounting Bracket

1.2.2  Mounting a Single Node

1.2.3  Mounting Multiple Nodes

1.3  Power and Ground Description

1.4  Ferrites

1.5  Cable Description and Installation

1.5.1  Cabling Types

1.5.2  Cable Guides

1.5.3  Cabling Sequence and Location

1.5.4  Fiber Cable Installation

1.5.5  Coaxial Cable Installation

1.5.6  DS-1 Cable Installation

1.5.7  Alarm Cable Installation

1.5.8  BITS Cable Installation

1.6  Fan-Tray Assembly

1.7  Alarm Cutoff

1.8  Timing Installation

1.9  Cards and Slots

1.9.1  Slot Requirements

1.9.2  Card Installation

1.10  Hardware Specifications

1.10.1  Slot Assignments

1.10.2  Cards

1.10.3  Configurations

1.10.4  Cisco Transport Controller

1.10.5  External LAN Interface

1.10.6  TL1 Craft Interface

1.10.7  Modem Interface

1.10.8  Alarm Interface

1.10.9  Database Storage

1.10.10  BITS Interface

1.10.11  System Timing

1.10.12  Power Specifications

1.10.13  Environmental Specifications

1.10.14  Dimensions


Shelf Assembly Hardware



Note The terms "Unidirectional Path Switched Ring" and "UPSR" may appear in Cisco literature. These terms do not refer to using Cisco ONS 15xxx products in a unidirectional path switched ring configuration. Rather, these terms, as well as "Path Protected Mesh Network" and "PPMN," refer generally to Cisco's path protection feature, which may be used in any topological network configuration. Cisco does not recommend using its path protection feature in any particular topological network configuration.


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:

Installation Overview

Rack Installation

Power and Ground Description

Ferrites

Cable Description and Installation

Fan-Tray Assembly

Alarm Cutoff

Timing Installation

Cards and Slots

Hardware Specifications


Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.



Warning This equipment must be installed and maintained by service personnel as defined by AS/NZS 3260. Incorrectly connecting this equipment to a general purpose outlet could be hazardous. The telecommunications lines must be disconnected 1) before unplugging the main power connector and/or 2) while the front door is open.



Warning The ONS 15327 is intended for installation in restricted access areas. A restricted access area is where access can only be gained by service personnel through the use of a special tool, lock, key, or other means of security. A restricted access area is controlled by the authority responsible for the location.



Warning The ONS 15327 is suitable for mounting on concrete or other non-combustible surfaces only.



Note The Cisco ONS 15327 assembly is intended for use with telecommunications equipment only.



Note The ONS 15327 is designed to comply with GR-1089-CORE Type 2 and Type 4. Install and operate the ONS 15327 only in environments that do not expose wiring or cabling to the outside plant. Acceptable applications include Central Office Environments (COEs), Electronic Equipment Enclosures (EEEs), Controlled Environment Vaults (CEVs), huts, and Customer Premise Environments (CPEs).


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 Read the installation instructions before you connect the system to its power source.



Note In this chapter, the terms "ONS 15327" and "shelf assembly" are used interchangeably. In the installation context, these terms have the same meaning. Otherwise, shelf assembly refers to the physical steel enclosure that holds cards and connects power, and ONS 15327 refers to the entire system, both hardware and software.


Install the ONS 15327 in compliance with your local and national electrical codes:

United States: National Fire Protection Association (NFPA) 70; United States National Electrical Code

Canada: Canadian Electrical Code, Part I, CSA C22.1

Other countries: If local and national electrical codes, are not available, refer to IEC 364, Part 1 through Part 7.


Warning Ultimate disposal of this product should be handled according to all national laws and regulations.


1.2  Rack Installation


Warning To prevent the equipment from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of 131°F (55°C) unless configured for inversion temperature (I-temp). All I-temp rated components are -40°C to +65°C. To prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings.


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 Use only the fastening hardware provided with the ONS 15327 to prevent loosening, deterioration, and electromechanical corrosion of the hardware and joined material.


Caution When mounting the ONS 15327 in a frame with a non-conductive coating (such as paint, lacquer, or enamel) use either the thread-forming screws provided with the ONS 15327 shipping kit or remove the coating from the threads to ensure electrical continuity.

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 This equipment must be grounded.



Warning When installing the node, you must connect the ground first and disconnect it last.


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 Do not apply power to the ONS 15327 until you complete all installation steps.



Warning Before performing any of the following procedures, ensure that the power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.



Caution Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.


Warning Do not mix conductors of dissimilar metals in a terminal or splicing connector where physical contact occurs (such as copper and aluminum, or copper and copper-clad aluminum), unless the device is suited for the purpose and conditions of use.


Use the following wiring conventions:

Red wire for battery (-48 VDC) connections

Black wire for battery return (0 VDC) connections


Note Use an external disconnect for service purposes and install it according to local site practice.


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 A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.



Warning Connect the unit only to DC power source that complies with the Safety Extra-Low Voltage (SELV) requirements in IEC 60950 based safety standards.



Warning When installing the node, the ground connection must always be made first and disconnected last.


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:

Optical cables: Optical cables connect to the SC connectors on the faceplate of the OC-12 and OC-48 cards and the LC connectors on the OC-3 cards (described in the "Fiber Cable Installation" section). Make sure the fiber cables do not bend excessively; maintaining a proper bend radius prevents damage to the optical cable.

Coaxial cables: Coaxial cables connect to the MICs on the ONS 15327 using BNC cable connectors. Coaxial cables carry DS-3 traffic to and from the ONS 15327. The ONS 15327 supports up to three transmit and three receive coaxial connectors on each shelf assembly.

AMP Champ cables: AMP Champ cables connect to MICs on the ONS 15327 using AMP Champ cable connectors. Each Champ connector on the MIC supports one AMP Champ cable connection for a total of two connectors per node. Each Champ connector supports a maximum of 14 DS-1s. See the "DS-1 Cable Installation" section for more information about the AMP Champ cables and connectors.

Twisted-pair cables for timing: Twisted-pair cables for timing connect to the BITS ports on the MICs. The twisted-pair cables for timing use RJ-45 connectors. Connecting to the BITS ports requires a BITS clock cable, twisted-pair #22 or #24 shielded AWG wire.

Category 5 Twisted-Pair cables: Category 5 Twisted-Pair cables connect to the ports on the E-Series Ethernet card, the alarm ports on the MICs, and the LAN port on the XTC cards. The twisted-pair cables use RJ-45 connectors. The Ethernet card ports and the LAN ports use a standard straight-through cable.

1.5.2  Cable Guides

The ONS 15327 has cable guides located on each side of the front of the shelf assembly (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. Attach power cables

2. Attach DS-1 (Champ) cables

3. Attach Alarm (RJ-45) cables

4. Attach BITS (RJ-45) cables

5. Attach DS-3 (BNC) cables

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 Always use the supplied electrostatic discharge wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top traffic and XTC slots.

ONS 15327 OC-12 and OC-48 cards have bSC 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 (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 Invisible laser radiation can be emitted from the aperture port when no cable is connected. To avoid exposure to laser radiation do not stare into open apertures.



Note Clean all fiber connectors thoroughly. Dust particles can degrade performance. Put caps on any fiber connectors that you do not use.


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 Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.

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

The MIC card uses AMP Champ connector cabling for DS-1 connections. Installing AMP Champ connector DS-1 cables requires 64-pin bundled cable connectors with a 64-pin male AMP Champ connector. Figure 1-13 shows DS-1 cable installation.

Figure 1-13 Installing a DS-1 Cable

1.5.6.1  Straight DS-1 Cable Connectors

Cisco-supplied AMP Champ DS-1 cables include a straight (180-degree) connector for use with the 19 inch Cisco tie-down bar (P/N 15327-TIE-BAR-19=) or 23 inch Cisco tie-down bar (P/N 15327-TIE-BAR-23=). Cisco offers four DS-1 cables with a straight AMP Champ connector. Table 1-1 shows the cable product numbers and lengths.

Table 1-1 Cisco-supplied DS-1 Cables With Straight AMP Champ Connector

Cisco Product Number
Length of Cable (ft)

15327-AMP-WW-30=

30

15327-AMP-WW-50=

50

15327-AMP-WW-100=

100

15327-AMP-WW-250=

250


In addition to the Cisco-supplied DS-1 cables, the MIC-A-1-T and MIC-B-1-T can use the CHAMP #552285-1 and 180 degree shell housing CHAMP # 552082-1 for DS-1 cabling with a straight AMP Champ connector.

1.5.6.2  90-Degree DS-1 Cable Connectors

A 90-degree angled connector is recommended for lower front profile applications. Cisco does not supply 90-degree connectors. For compatible third-party DS1 cables with 90-degree connectors, see Table 1-2:

Table 1-2 Third-party DS-1 Cables With 90-degree DS-1 Connectors

MIC-28-3 Version
End of Sale
Third-party DS1 Connector

15327-MIC-28-3-A

15327-MIC-28-3-A=

15327-MIC-28-3-B

15327-MIC-28-3-B=

June 2002

"Bail loop" type DS1 connector requires CHAMP #552276-1 and a 90-degree shell housing #1-552496-1, or functional equivalents.

15327-MIC-A-T

15327-MIC-A-T=

15327-MIC-B-T

15327-MIC-B-T=

October 2003

"Screw down/lock" type connector requires CHAMP #552285-1 and 90-degree shell housing #1-552496-1, or functional equivalents.

15327-MIC-A-1-T

15327-MIC-A-1-T=

15327-MIC-B-1-T

15327-MIC-B-1-T=

Current production

"Screw down/lock" type connector requires one of the following:

Amphenol #GCA70

GCA70 03006 RSE (30 foot cable)

GCA70 03007 RSE (50 foot cable)

GCA70 03008 RSE (100 foot cable)

GCA70 03009 RSE (250 foot cable)

Volex #VLX979

VLX979-30 (30 foot cable)

VLX979-50 (50 foot cable)

VLX979-100 (100 foot cable)

VLX979-250 (250 foot cable)

Functional equivalent


Contact info for 90-degree cables:

Alpine Electronics (distributor for Amphenol)

Phone number (408) 278-7171

Volex Inc.

Phone number (510) 360-5250


Note 90-degree connectors/cables that were compatible with previous versions of MIC cards may interfere with the power connector on the newest version of MIC cards. Customers who are replacing an older version MIC with a spare new version MIC and utilize the same/existing cables as used on the old MIC, may remove the 90-degree shell housing and replace with 180 degree shell housing 552082-1 to avoid interference with the power connector.



Note Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top traffic slots and XTC slots.


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 1-3 shows the input alarm pinouts and the corresponding alarm numbers assigned to each MIC port.

Table 1-3 Alarm Input Pin Assignments

Alarm Input Number (MIC A)
Alarm Input Number (MIC B)
RJ-45 Pin Number
Function


2


1

5

Alarm 2+

6

Alarm 2-


4


3

3

Alarm 1+

4

Alarm 1-


6


5

1

Alarm 0+

2

Alarm 0-


Table 1-4 shows the output alarm pinouts.

Table 1-4 Alarm (External Control) Output Pin Assignments

Alarm Output Number (MIC A)
Alarm Output Number (MIC B)
RJ-45 Pin Number
Function


2


1

7

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 1-5 for the BITS cable pin assignments.

Table 1-5 BITS Cable Pin Assignments 

MIC A
MIC B
RJ-45 Pin Number
Function


BITS 1 In


BITS 2 In

3

BITS Input+

4

BITS Input-


BITS 1 Out


BITS 2 Out

7

BITS Output+

8

BITS Output-


Figure 1-15 shows the BITS In pins on the RJ-45 connector.

Figure 1-15 BITS In Pins on the RJ-45 Connector

Figure 1-16 shows the BITS Out 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 Do not force the fan-tray assembly into place while installing it. Forcing the fan-tray assembly into place can damage the connectors on the fan tray and/or the connectors on the back panel of the shelf assembly.

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 1-6 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.

Table 1-6 External Timing Pin Assignments for BITS 

External Device
Contact
RJ-45 Pin
Tip & Ring
Function

First external device

(MIC A)

BITS 1 Out

7

Primary ring (-)

Output to external device

BITS 1 Out

8

Primary tip (+)

Output to external device

BITS 1 In

3

Secondary ring (-)

Input from external device

BITS 1 In

4

Secondary tip (+)

Input from external device

Second external device

(MIC B)

BITS 2 Out

7

Primary ring (-)

Output to external device

BITS 2 Out

8

Primary tip (+)

Output to external device

BITS 2 In

3

Secondary ring (-)

Input from external device

BITS 2 In

4

Secondary tip (+)

Input from external device



Note Refer to Telcordia SR-NWT-002224 for rules about how to provision timing references.


1.9  Cards and Slots


Caution Always use the supplied ESD wristband when working with a powered ONS 15327. Plug the wristband cable into the ESD jack located between the top high-speed and XTC slots.

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 The optical cards for the ONS 15327 are Class 1 laser products. These products have been tested and comply with Class 1 limits.



Note DS-1 and DS-3 interfaces are not intended for direct connection to the network. These interfaces should be connected to the network via a CSU/DSU that has the proper certification.


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 "Card Reference" for more information about ONS 15327 cards.

Table 1-7 lists the number of ports, line rates, connector options, and connector locations for ONS 15327 optical, electrical, and Ethernet interfaces.

Table 1-7 Port Line Rates, Connector Types, and Locations 

Interface
Ports
Line Rate per Port
Connector Types
Connector Location

DS-1

1-28

1.544 Mbps

CHAMP
Connector

MIC faceplate

DS-3

3

44.736 Mbps

BNC

MIC faceplate

E10/100-4

4

10/100 Mbps

RJ-45

E10/100-4
card faceplate

G1000-2

2

1000 Mbps

LC (GBIC)

E1000-2 card faceplate

OC-3 IR 1310

4

155.52 Mbps
(STS-3)

LC

OC-3 IR 1310 card faceplate

OC-12 IR 1310

1

622.08 Mbps (STS-12)

SC

OC-12 IR 1310 card faceplate

OC-12 LR 1550

1

622.08 Mbps
(STS-12)

SC

OC-12 LR 1550 card faceplate

OC-48 IR 1310

1

2488.32 Mbps (STS-48)

SC

OC-48 IR 1310 card faceplate

OC-48 LR 1550

1

2488.32 Mbps (STS-48)

SC

OC-48 LR 1550 card faceplate


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 Because all traffic cards boot from the working XTC card, at least one XTC card must be installed in order to boot any traffic cards.



Warning Invisible laser radiation can be emitted from the aperture port when no cable is connected. To avoid exposure to laser radiation and do not stare into open apertures.


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 Install blank faceplates into empty card slots. Blank faceplates serve three functions: They prevent exposure to hazardous voltages and currents inside the ONS 15327 chassis, they eliminate electromagnetic interference (EMI) that might disrupt other equipment, and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards and faceplates are in place.


1.10  Hardware Specifications

The following sections list the hardware specifications for the ONS 15327 shelf assembly.

1.10.1  Slot Assignments

Total card slots: 8

Traffic slots (E10/100-4, G1000-2, OC-3, OC-12, and OC-48): Slots 1- 4

XTC (Cross Connect, Timing and Control): Slots 5, 6

MIC (Mechanical Interface Card): Slots 7, 8

1.10.2  Cards

XTC-14

XTC-28-3

MIC A

MIC B

E10/100-4

G1000-2

OC-3 IR 4 1310

OC-12 IR 1310

OC-12 LR 1550

OC-48 IR 1310

OC-48 LR 1550

1.10.3  Configurations

Point-to-point terminal

Add-drop multiplexer

Two-fiber Path Protection

Path-protected mesh network (PPMN)

Two-fiber BLSR (OC-12 and OC-48 cards only)

1.10.4  Cisco Transport Controller

10 Base-T

XTC access: RJ-45 connector

1.10.5  External LAN Interface

10 Base-T Ethernet

1.10.6  TL1 Craft Interface

Speed: 9600 bps

XTC access: RS-232 DB-9 type connector

1.10.7  Modem Interface

Hardware flow control

XTC: RS-232 DB-9 type connector

1.10.8  Alarm Interface

Visual: Critical, Major, Minor, Remote

Audible: Critical, Major, Minor, Remote

Alarm contacts: 0.045mm, -48V, 50 mA

1.10.9  Database Storage

Nonvolatile memory: 96 MB, FLASH memory

1.10.10  BITS Interface

2 DS-1 BITS inputs

2 derived DS-1 outputs

1.10.11  System Timing

Stratum 3, compliant with Telcordia GR-253-CORE

Free running accuracy: ± 4.6 ppm

Holdover Stability: 3.7 x10 -7 /day, including temperature (< 255 slips in first 24 hours)

Reference: External BITS, line, internal

1.10.12  Power Specifications

Input power: -48 VDC

Power consumption: 260 W (maximum draw w/cards)

Power Requirements: -42 to -56 VDC

Power terminals: Removable screw-locking (#12-14 AWG)

1.10.13  Environmental Specifications

Operating Temperature: 0 to +55 degrees Celsius

Operating Humidity: 5 - 95%, non-condensing

The FTA is required to fulfill environmental specifications.

1.10.14  Dimensions

Height: 5.1 inches (13 cm)

Width:19 or 23 inches (48.3 or 58.4 cm) with mounting ears attached

Depth: 11 inches (28 cm)

Weight: 15 lbs., empty (with fan-tray assembly); 27 lbs, maximum