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Table Of Contents
13.1.2 Mechanical Interface Cards
13.2.3 Optical Card Protection
13.3 XTC Cards (XTC-28-3/XTC-14)
13.3.3 XTC Cards (XTC 28-3/XTC-14) Specifications
13.4 Mechanical Interface Cards
13.5.1 OC3 IR 4 1310 Card Description
13.5.2 OC3 IR 4 1310 Card-Level Indicators
13.5.3 OC3 IR 4 1310 Card Specifications
13.6.1 OC12 IR 1310 Card Description
13.6.2 OC12 IR 1310 Card-Level Indicators
13.6.3 OC12 IR 1310 Card Specifications
13.7.1 OC12 LR 1550 Card Description
13.7.2 OC12 LR 1550 Card-Level Indicators
13.7.3 OC12 LR 1550 Card Specifications
13.8.1 OC48 IR 1310 Card Description
13.8.2 OC48 IR 1310 Card-Level Indicators
13.8.3 OC48 IR 1310 Card Specifications
13.9.1 OC48 LR 1550 Card Description
13.9.2 OC48 LR 1550 Card-Level Indicators
13.9.3 OC48 LR 1550 Card Specifications
13.10.1 E10/100-4 Card Description
13.10.2 E10/100-4 Card-Level Indicators
13.10.3 E10/100-4 Port-Level Indicators
13.10.4 E10/100-4 Card Specifications
Card Reference
This chapter describes the Cisco ONS 15327 cards. It includes descriptions, hardware specifications, and block diagrams for each card. For installation and turn-up procedures, refer to Chapter 1, "Hardware Installation."
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The I-Temp symbol is displayed on the faceplate of an I-Temp compliant card. A card without this symbol is C-Temp compliant.
13.1 Overview
The Cisco ONS 15327 uses common control cards, mechanical interface cards, optical cards, and an Ethernet/fast Ethernet card. This overview provides a summary of the cards. Figure 13-1 shows the ONS 15327 slot assignments.
Figure 13-1 ONS 15327 slot assignments
13.1.1 Common Control Cards
The two common control cards are the XTC-28-3 card and the XTC-14 card. Both cards provide timing, control, and digital cross-connect functions. They also provide the EIA/TIA-232 DB9 TL1 connection and RJ-45 LAN connection. The XTC-28-3 provides electrical-tributary circuitry for 28 DS-1s and three DS-3s. The XTC-14 provides electrical-tributary circuitry for 14 DS-1s.
13.1.2 Mechanical Interface Cards
The MICs provide the physical connection points for the DS-1 and DS-3 interfaces on the XTC cards, the redundant power inputs, the alarm inputs and outputs, and the building integrated timing supply (BITS) inputs and outputs.
13.1.3 Optical Cards
The optical cards include the OC3 IR 4 1310, OC12 IR 1310, OC12 LR 1550, OC48 IR 1310, and the OC48 LR 1550. The OC3 IR 1310 card provides four intermediate-reach OC-3 interfaces. The OC12 IR 1310 card provides one intermediate- or short-reach OC-12 interface and the OC12 LR 1550 provides one long-reach OC-12 interface. The OC48 IR 1310 card provides one intermediate-reach OC-48 interface and the OC48 LR 1550 provides one long-reach OC-48 interface.
13.1.4 Ethernet Card
The Ethernet card provides four layer-2-switched, autosensing, 10/100 BASE-T Ethernet interfaces. Each interface supports full-duplex operation for a maximum bandwidth of 200 Mbps per port.
13.2 Card Protection
The ONS 15327 provides both optical and electrical protection methods. The XTC-14 card provides electrical-protection circuitry for DS-1s. The XTC-28-3 provides electrical-protection circuitry for DS-1s and DS-3s. The optical cards use 1+1 protection, in which one optical port protects another optical port of the same type. This section describes the protection options.
13.2.1 Unprotected
Unprotected cards are not included in a protection scheme; therefore, a card failure or a signal error causes lost data. Because no bandwidth is reserved for protection, unprotected schemes maximize the available ONS 15327 bandwidth. On the ONS 15327, only OC-N cards can run unprotected. DS-N cards are protected by default because of the automatically created protection group, XTCProtGroup.
13.2.2 Electrical Protection
The XTC cards provide protection for the DS-1 and DS-3 circuits and for each other when installed in a redundant configuration (when XTCs are installed in Slots 5 and 6). The ONS 15327 provides 1:1 protection by default. In 1:1 protection, a working card is paired with a protect card of the same type. Electrical protection in the ONS 15327 is bidirectional; after a failure, automatic protection switching (APS) switches the traffic from the working card to the protect card, where the signal stays until it is manually switched back. In the ONS 15327, the working XTC card is installed in Slot 6, the protect XTC is installed in Slot 5. If any circuits fail on the working XTC, all functionality switches to the protect XTC card (not just the failed circuit).
13.2.3 Optical Card Protection
The ONS 15327 currently supports 1+1 protection to create redundancy for optical cards. Working and protection spans are defined by card slot pairs. The same optical cards in any two slots can be paired for protection. 1+1 protection pairs a single working card with a single dedicated protect card. If the working card fails, the protect card takes over.
13.2.4 Protection Switching
Unidirectional switching allows traffic on the transmit and receive fibers to switch independently. With bidirectional switching, transmit and receive lines switch together.
With non-revertive 1+1 protection, APS switches a signal after a failure from the working card to the protect card and the signal stays switched to the protect card until it is manually switched back. Revertive switching automatically switches the signal back to the working card when the working card comes back online. 1+1 protection is unidirectional and non-revertive by default; revertive switching is easily provisioned using Cisco Transport Controller (CTC).
The ONS 15327 Release 3.3 supports unidirectional path switched ring (UPSR) and bidirectional line switched ring (BLSR) configurations, providing additional methods of optical protection.
13.3 XTC Cards (XTC-28-3/XTC-14)
This section describes the features and functions of the XTC cards.
13.3.1 XTC Card Description
The XTC cards perform system initialization, provisioning, alarm reporting, maintenance, diagnostics, IP address detection and resolution, SONET DCC termination, system fault detection, and cross-connect maintenance and management for the ONS 15327. The XTC cards also provide the circuitry for the DS-1 and DS-3 interfaces and ensure that the system maintains Telcordia timing requirements.
An XTC card is required to operate the ONS 15327 and can be used in a redundant or non-redundant configuration. Figure 13-2 shows the XTC-28-3 faceplate, Figure 13-3 shows the XTC-14 faceplate, and Figure 13-5 diagrams the functionality.
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Figure 13-2 XTC-28-3 card faceplate
Figure 13-3 XTC-14 card faceplate
13.3.1.1 XTC Front Panel
The XTC cards have an alarm cutoff (ACO) button, an RJ-45 LAN port, an EIA/TIA-232 TL1 (CRAFT) interface port, and a LAMP TEST button. The XTC-28-3 front panel has 12 LEDs, and the XTC-14 front panel has 11. The following list describes each LED:
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13.3.1.2 Support for DS-1 and DS-3
The XTC cards contain the circuitry for connecting DS-1s. The XTC-28-3 also contains the circuitry for connecting DS-3s. The XTC-28-3 supports 28 DS-1s and 3 DS-3s. The XTC-14 supports 14 DS-1s. The DS-1 circuitry on the XTC cards maps each of the received DS-1 signals into VT1.5s and concatenates these virtual tributaries (VTs) into one STS-1. Full VT1.5 grooming is supported.
The physical connection points are located on the MIC cards. See the "MIC Description" section for more information about physical connections.
13.3.1.3 XTC Timing and Control Functionality
The XTC cards combine the timing and control functions into one card. You can install the XTC cards in one or both of the control slots (Slots 5 and 6). XTC cards must be installed in both of the control slots for redundancy. In a non-redundant configuration, you must install the XTC in Slot 6.
The XTC cards support multichannel, High-level Data Link Control (HDLC) processing for the DCC. Up to four DCCs can be routed over the serial communication interface (SCI) and terminated at the XTC card. The XTC cards process ten DCCs to enable remote system management interfaces.
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The XTC cards also originate and terminate a cell bus carried over the SCI. The cell bus supports links between any two cards in the system, which is essential for peer-to-peer communication. Peer-to-peer communication accelerates protection switching for redundant cards.
The XTC cards select a recovered clock from optical line cards, a building integrated timing supply (BITS), or an internal Stratum 3 reference as the system timing reference.
The node database, IP address, and system software are stored in XTC card non-volatile memory, which allows quick recovery in the event of a power or card failure.
The XTC cards perform all system-timing functions for each ONS 15327. The XTC cards select a recovered clock, a building integrated timing supply (BITS), or an internal Stratum 3 reference as the system-timing reference. You can provision any of the clock inputs as a primary or secondary timing source. A slow-reference tracking loop allows the XTC cards to synchronize to the recovered clock, which provides holdover if the reference is lost.
In a redundant configuration, if the working XTC card fails, traffic switches to the protect XTC card. All XTC protection switches conform to protection switching standards when the bit error rate (BER) counts are not in excess of 1 E-3 and completion time is less than 50 ms.
The XTC-cards feature an RJ-45 10Base-T LAN port and an EIA/TIA-232 DB9 type craft interface for user interfaces. The craft port runs at 9600 bps.
13.3.1.4 XTC Cross-Connect Functionality
The XTC card is the central element for ONS 15327 switching. It establishes cross connections and performs time-division switching (TDS) at the STS-1 and VT1.5 level between ONS 15327 traffic cards.
The switch matrix on the XTC card consists of 288 bidirectional ports. When creating bidirectional STS-1 cross-connects, each cross-connect uses two STS-1 ports. This results in 144 bidirectional STS-1 cross-connects. The switch matrix is non-blocking and broadcast supporting. This allows network operators to concentrate or groom low-speed traffic from line cards onto high-speed transport spans and to drop low-speed traffic from transport spans onto line cards. Figure 13-4 shows the cross-connect matrix for the XTC card.
Figure 13-4 Cross-connect matrix
The XTC card supports a total of 672 cross-connects with a payload granularity of VT 1.5. The VT functionality supports ring configurations with a mix of VT-capable Cisco transport network elements (NEs) and STS-only capable Cisco transport NEs.
The XTC card provides protection switching control for external and internal VT paths. The card also performs path- and STS-level monitoring and protection switching.
13.3.2 VT Mapping
The Cisco ONS 15327 performs VT mapping according to Telcordia GR-253 standards. Table 13-1 shows the VT numbering scheme for the ONS 15327 as it relates to the Telcordia standard.
Figure 13-5 XTC block diagram
13.3.3 XTC Cards (XTC 28-3/XTC-14) Specifications
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13.4 Mechanical Interface Cards
This section describes the features and functions of the MICs.
13.4.1 MIC Description
Two MIC cards (MIC A and MIC B) are required to operate the Cisco ONS 15327 if you are using XTC-28-3 cards and/or you need redundant power inputs. The MICs provide power connection points, physical interfaces for DS-1s and DS-3s, and external timing and alarm interfaces.
Figure 13-6 shows the MIC A faceplate. MIC A is keyed so that it can only be installed in Slot 8.
Figure 13-6 MIC A card faceplate
Figure 13-7 shows the MIC-28-3-B faceplate. MIC-B is keyed so that it can only be installed in Slot 7.
Figure 13-7 MIC B card faceplate
13.4.1.1 DS-1 Physical Interface
Each MIC uses a 64-pin CHAMP connector to provide 14 DS-1 interfaces. MIC-28-3-A provides connection to DS-1s 1 - 14, and MIC-28-3-B provides connection to DS-1s 15 - 28. The XTC cards house the electrical tributary circuitry for managing the individual DS-1s.
13.4.1.2 DS-3 Physical Interface
Because transmit (out) and receive (in) interfaces are on different cards, you must install both MICs to use the DS-3 capabilities of the ONS 15327. The DS-3 interfaces use BNC connectors. MIC-28-3-A provides the three transmit (Tx) interfaces and MIC-28-3-B provides the three receive (Rx) interfaces. The XTC-28-3 card houses the electrical-tributary circuitry for managing DS-3s.
13.4.1.3 Power Connection
Each MIC has one -48 VDC power terminal that uses spring terminal block connectors and accepts #12-16 AWG wire (the NEC requires 12-14 AWG wire). To establish redundant power, install both MICs and connect each one to a power source.
13.4.1.4 Alarm Interface
Each MIC has one Form C discrete external control. Connection to the external control uses an RJ-45 connector. Two wires of the RJ-45 connector are used for the external control, which defaults to the open position. Each MIC also has three Form C discrete external alarm inputs. The alarm input connections are made using the same RJ-45 connector as the external control. Six wires of the RJ-45 connector are used for the external alarm input. Make the physical connections using the RJ-45 ALARM port on each MIC (for additional information, refer to the "Alarm Cable Installation" section on page 1-27).
In CTC you can provision the six external alarm inputs (three on each MIC) and the two external controls (one on each MIC), collectively referred to as alarm contacts. External alarm inputs are typically used for external sensors such as open doors, temperature sensors, flood sensors, and other environmental conditions. External controls are typically used to drive visual or audible devices such as bells and lights, but they can control other devices such as generators, heaters, and fans. For provisioning information about the external contacts, see the following section.
13.4.1.5 Provisioning I/O Alarm Contacts
You can program each of the six Form C external alarms (inputs) separately. They can be set to Alarm on Closure or Alarm on Open. The alarm severity can be set to any of the levels (Critical, Major, Minor, Not Alarmed, Not Reported). In addition to severity, you can set alarm type and virtual wire for alarm contacts 1 - 4 and define when the alarm is raised. You can assign a 63-character alarm description for display in the alarm log of the CTC. The alarm condition remains until the external input quits driving the contact and you clear the alarm in the CTC. For instructions, refer to the "Using Virtual Wires" section on page 7-17.
You can also program the two Form C external controls (outputs) separately. You can set them to close when the specified alarm condition is triggered; the default condition for output alarms is the open position. The alarm triggering conditions can be any ONS 15327 alarm condition including the user-defined input alarms, severity-based (e.g. trigger when any Major alarm happens) alarms, or remote alarms. CTC provisioning of this alarm-to-output-contact association is menu driven and includes alarms and individual alarms within categories. The output contact electrical interface is 50 V 100, mA. For procedures that provision external controls, refer to the "Using Virtual Wires" section on page 7-17.
13.4.1.6 BITS Interface
Each MIC provides connection for one BITS clock input and one BITS clock output using an RJ-45 connector. Both use two wires of the RJ-45 connector.
13.4.2 MIC Specifications
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13.5 OC3 IR 4 1310 Card
This section describes the features and functions of the OC3 IR 4 1310 card. Refer to this section for general information about the OC3 IR 4 1310 card.
13.5.1 OC3 IR 4 1310 Card Description
The OC3 IR 4 1310 card provides four intermediate-reach, Telcordia-compliant, GR-253 SONET OC-3 interfaces per card. The interface operates at 155.52 Mbps over a single-mode fiber span and supports VT payloads and non-concatenated or concatenated payloads for STS-1 or STS-3c. Figure 13-10 shows the OC3 IR 4 1310 faceplate and Figure 13-11 diagrams the card's functionality.
Figure 13-8 OC3 IR 4 1310 card faceplate
You can install the OC3 IR 4 1310 card in any ONS 15327 high-speed card slot. The card can be provisioned as part of a UPSR or in a linear add-drop multiplexer (ADM) configuration.The card does not support BLSR. Each port features a 1310 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The card uses LC connectors.
The OC3 IR 4 1310 card supports 1+1 unidirectional or bidirectional protection switching. You can provision protection on a per-port basis. See the "Optical Card Protection" section, for more information.
The OC3 IR 4 1310 detects loss of signal (LOS), loss of frame (LOF), loss of pointer (LOP), line alarm indication signal (AIS-L), and line Remote Defect Indication (RDI-L) conditions. See Chapter 14, "Alarm Troubleshooting" for a description of these conditions. The card also counts section and line bit interleaved parity (BIP) errors.
13.5.2 OC3 IR 4 1310 Card-Level Indicators
The OC3 IR 4 1310 card has three card-level LED indicators ( Table 13-2)
Figure 13-9 OC3 IR 4 1310 card block diagram
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13.5.3 OC3 IR 4 1310 Card Specifications
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13.6 OC12 IR 1310 Card
This section describes the features and functions of the OC12 IR 1310 card. Refer to this section for general information about the OC12 IR 1310 card.
13.6.1 OC12 IR 1310 Card Description
The OC12 IR 1310 card provides one intermediate- or short-reach, Telcordia-compliant, GR-253 SONET OC-12 interface per card. The interface operates at 622.08 Mbps over a single-mode fiber span and supports VT payloads and non-concatenated or concatenated payloads for STS-1, STS-3c, STS-6c, or STS-12c. Figure 13-10 shows the OC12 IR 1310 faceplate and Figure 13-11 diagrams the card's functionality.
Figure 13-10 OC12 IR 1310 card faceplate
You can install the OC12 IR 1310 card in any ONS 15327 high-speed and provision the card as a drop card or span card in a two-fiber BLSR, UPSR, or in ADM (linear) configurations.
The OC12 IR 1310 port features a 1310 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The OC12 IR 1310 card uses SC optical connections and supports 1+1 unidirectional and bidirectional protection.
The OC12 IR 1310 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. See Chapter 14, "Alarm Troubleshooting" for a description of these conditions. The card counts section and line BIT errors.
13.6.2 OC12 IR 1310 Card-Level Indicators
The OC12 IR 1310 card has three card-level LED indicators ( Table 13-3).
Figure 13-11 OC12 IR 1310 card block diagram
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13.6.3 OC12 IR 1310 Card Specifications
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13.7 OC12 LR 1550 Card
This section describes the features and functions of the OC12 LR 1550 card. Refer to this section for general information about the OC12 LR 1550 card.
13.7.1 OC12 LR 1550 Card Description
The OC12 LR 1550 card provides one long-reach, Telcordia-compliant, GR-253 SONET OC-12 interface per card. The interface operates at 622.08 Mbps over a single-mode fiber span and supports VT payloads and non-concatenated or concatenated payloads for STS-1, STS-3c, STS-6c, or STS-12c. Figure 13-12 shows the OC12 LR 1550 faceplate and Figure 13-13 diagrams the card's functionality.
Figure 13-12 OC12 LR 1550 card faceplate
You can install the OC12 LR 1550 card in any ONS 15327 high-speed card slot. You can provision the OC12 LR 1550 as part of a UPSR if desired. In ADM/TM configurations, you can provision the card as either an access tributary or a transport span-side interface.
The OC-12 interface features a 1550 nm laser and contains a transmit (Tx) and receive (Rx) connector (labeled) on the card faceplate. The OC12 LR 1550 uses SC connectors. The OC12 LR 1550 card supports 1+1 unidirectional protection and provisionable bidirectional switching.
The OC12 LR 1550 detects loss of signal (LOS), loss of frame (LOF), and loss of pointer (LOP), and line alarm indication signal (AIS-L) conditions (refer to Chapter 14, "Alarm Troubleshooting" for a complete description of alarm conditions). The OC12 LR 1550 counts path and line BIT errors.
The OC12 LR 1550 extracts the K1 and K2 bytes from the SONET overhead to perform an appropriate protection switch. The DCC bytes are forwarded to the DCC-terminating XTC.
13.7.2 OC12 LR 1550 Card-Level Indicators
The OC12 LR 1550 card has three card-level LED indicators ( Table 13-4).
Figure 13-13 OC12 LR 1550 card block diagram
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13.7.3 OC12 LR 1550 Card Specifications
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13.8 OC48 IR 1310 Card
This section describes the features and functions of the OC48 IR 1310 card. Refer to this section for general information about the OC48 IR 1310 card.
13.8.1 OC48 IR 1310 Card Description
The OC48 IR 1310 card provides one intermediate-reach, Telcordia-compliant, GR-253 SONET OC-48 interface per card. Each interface operates at 2488.320 Mbps over a single-mode fiber span and supports VT payloads and non-concatenated or concatenated payloads for STS-1, STS-3c, STS-6c, STS-12c, or STS-48c. Figure 13-14 shows the OC48 IR 1310 faceplate and Figure 13-15 diagrams the card's functionality.
Figure 13-14 OC48 IR 1310 faceplate
You can install the OC48 IR 1310 card in any ONS 15327 high-speed card slot and provision the card as a drop or span card in a two-fiber BLSR, UPSR, or in an ADM (linear) configuration.
The OC-48 port features a 1310 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The OC48 IR 1310 uses SC connectors. The card supports 1+1 unidirectional and bidirectional protection switching.
The OC48 IR 1310 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. See Chapter 14, "Alarm Troubleshooting", for a description of these conditions. The card also counts section and line BIT errors.
13.8.2 OC48 IR 1310 Card-Level Indicators
The OC48 IR 1310 card has three card-level LED indicators ( Table 13-5).
Figure 13-15 OC48 IR 1310 block diagram
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13.8.3 OC48 IR 1310 Card Specifications
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13.9 OC48 LR 1550 Card
This section describes the features and functions of the OC48 LR 1550 card. Refer to this section for general information about the OC48 LR 1550 card.
13.9.1 OC48 LR 1550 Card Description
The OC48 LR 1550 card provides one intermediate-reach, Telcordia-compliant, GR-253 SONET OC-48 interface per card. Each interface operates at 2488.320 Mbps over a single-mode fiber span and supports VT payloads and non-concatenated or concatenated payloads for STS-1, STS-3c, STS-6c, STS-12c, or STS-48c. Figure 13-16 shows the OC48 LR 1550 faceplate and Figure 13-17 diagrams the card's functionality.
Figure 13-16 OC48 LR 1550 faceplate
You can install the OC48 LR 1550 card in any ONS 15327 high-speed card slot and provision the card as a drop or span card in a two-fiber BLSR, UPSR, or in an ADM (linear) configuration.
The OC48 LR 1550 port features a 1550 nm laser and contains a transmit and receive connector (labeled) on the card faceplate. The card uses SC connectors, and it supports 1+1 unidirectional and bidirectional protection switching.
The OC48 LR 1550 detects LOS, LOF, LOP, AIS-L, and RDI-L conditions. See Chapter 14, "Alarm Troubleshooting" for a description of these conditions. The card also counts section and line BIT errors.
13.9.2 OC48 LR 1550 Card-Level Indicators
The OC48 LR 1550 card has three card-level LED indicators ( Table 13-6).
Figure 13-17 OC48 LR 1550 block diagram
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13.9.3 OC48 LR 1550 Card Specifications
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13.10 E10/100-4 Card
This section describes the features and functions of the ONS 15327 Ethernet card, called the E10/100-4 card. Refer to this section for information about the E10/100-4 card.
13.10.1 E10/100-4 Card Description
The E10/100-4 card provides four IEEE 802.3-compliant, 10/100 interfaces. Each interface supports full-duplex operation for a maximum bandwidth of 200 Mbps per port and 622 Mbps per card. Each port can independently detect the speed of an attached device (auto-senses) and automatically connects at the appropriate speed. The ports auto-configure to operate at either half or full duplex and can determine whether to enable or disable flow control. You can manually set the ports' speed and duplex mode. The card's faceplate and functionality are shown in Figure 13-18 and Figure 13-19.
Figure 13-18 E10/100-4 faceplate
The E10/100-4 Ethernet card provides high-throughput, low-latency packet switching of Ethernet traffic across a SONET network while providing a greater degree of reliability through SONET "self-healing" protection services. This Ethernet capability enables network operators to provide multiple 10/100 Mbps access drops for high-capacity customer LAN interconnects, Internet traffic, and cable modem traffic aggregation. Efficient transport and co-existence of traditional TDM traffic with packet-switched data traffic is provided.
Each E10/100-4 card supports standards-based, wire-speed, layer 2 Ethernet switching between its Ethernet interfaces. 802.1Q-tag and port-based VLANs are supported in order to logically isolate traffic (typically subscribers). Priority queuing is also supported in order to provide multiple classes of service.
You can install the E10/100-4 card in any high-speed slot in the shelf assembly. Multiple Ethernet cards installed in an ONS 15327 can act as a single switch or multiple switches supporting a variety of SONET port configurations. To create logical SONET ports, provision a number of STS channels to the packet switch entity within the ADM. You can create logical ports with a bandwidth granularity of STS-1. The ONS 15327 can support six STS-1s, two STS-3cs, one STS-6c, or one STS-12c in single-card EtherSwitch mode. It supports three STS-1s or one STS-3c in multi-card EtherSwitch mode.
13.10.2 E10/100-4 Card-Level Indicators
The E10/100-4 card faceplate has two card-level LED indicators ( Table 13-7).
13.10.3 E10/100-4 Port-Level Indicators
The E10/100-4 card also has 4 pairs of LEDs (one pair for each port) to indicate port conditions ( Table 13-8). See Chapter 14, "Alarm Troubleshooting" for a complete description of the alarm messages.
Table 13-8 E10/100-4 Port-Level Indicators
Transmitting and Receiving
Idle and Link Integrity
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Figure 13-19 E10/100-4 block diagram
13.10.4 E10/100-4 Card Specifications
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Posted: Mon Feb 25 05:52:08 PST 2008
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