The Cisco® ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card provides a cost-effective, high-density DS-3 interface solution for hand-offs between interexchange carriers (IXCs) and incumbent carriers as well as a channelized interface for router WAN connectivity.
The Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card (Figure 1) provides 12 Telcordia-compliant, GR-499-CORE DS-3 C-Bit or M2/3 framed interfaces operating at 44.736 Mbps. The card demultiplexes a channelized DS-3 into 28 DS-1s, maps each DS-1 to a VT1.5, then multiplexes the 28 VT1.5s into a VT-mapped STS-1 before hand-off to the Cisco ONS 15454 cross-connect card. The integration of transmultiplexing capabilities into the Cisco ONS 15454 Multiservice Provisioning Platform (MSPP) reduces the need for outboard M13 multiplexers or wideband digital cross-connect systems to access and groom DS-1 signals from channelized DS-3 interfaces. The 12-port DS-3 transmultiplexer card offers grooming flexibility by supporting two ways to receive the DS-3 signal, ported or portless. Ported terminations refer to DS-3 interfaces that are received through 75-ohm coaxial cables from the shelf assembly's electrical interface adapter (EIA) panels. Portless termination is a channelized DS-3 signal received over an STS-1 circuit from a SONET optical line (OC-n). The portless capability eliminates the need to terminate a channelized DS-3 signal on the shelf assembly and then re-insert.
Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card
The 12-port DS-3 transmultiplexer card supports multiple card-protection options, including 1:0 (unprotected), 1:1 and 1:N, N≤5 for ported terminations, or N≤7 for portless terminations. It can be provisioned to operate as either a working or a protection card, reducing spares inventories and their associated cost. The 12-port DS-3 transmultiplexer card supports circuit-level interoperability with the existing Cisco ONS 15454 SONET 6-Port DS-3 Transmultiplexer Card. The system supports in-service upgrades from the 6-port card to the 12-port card, allowing the user to increase the number of interfaces supported on a shelf assembly or reduce the number of shelf slots required to terminate a given quantity of DS-3 interfaces.
To aid with troubleshooting and fault isolation, the 12-port DS-3 transmultiplexer card supports near-end and far-end performance-monitoring capabilities at the SONET, DS-3, and DS-1 levels. The card incorporates three faceplate-mounted status indicators: a red FAIL LED for hardware-level problems; dual color, green/yellow ACTIVE/STANDBY LED to indicate when the card is being used as the active or protection card; and a yellow SIGNAL FAIL LED for problems being received on incoming ports. The condition of the card's individual interface ports can be queried using the shelf's liquid crystal display (LCD) panel as well as the browser-based Cisco Transport Controller craft interface.
Hand-Off Between Service Providers
The Cisco ONS 15454 12-Port DS-3 Transmultiplexer Card can be used in a variety of applications. The channelized DS-3 is a very popular intercarrier hand-off between two service providers (Figure 2) because it allows the aggregation of many lower-bandwidth, leased-line DS-1 services to a single, consolidated interface, reducing cabling complexity. The 12-port DS-3 transmultiplexer card's high port density allows the service provider to deploy fewer cards and chassis, reducing central-office footprint, power, and technician complexity.
A similar application is using a channelized DS-3 interface to hand off multiple services to an aggregation router (Figure 3). Again, the 12-port DS-3 transmultiplexer card's high port density allows the user to deploy fewer cards and chassis, reducing footprint, power, and technician complexity.
Aggregation Router Hand-Off
KEY FEATURES AND BENEFITS
The Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card offers the following features:
• Ported and portless DS-3 operation to provide flexible grooming options as well as eliminate some intrashelf cabling and interface card ports, reducing capital expenditures (CapEx).
• SONET (STS and VT), DS-1, and DS-3 performance monitoring for proactive maintenance as well as fault isolation.
• Facility data-link termination and generation to allow monitoring of customer premises equipment (CPE) supporting this capability.
• Provisionable response to far-end activation code (FEAC) requests allows users the flexibility to manage the behavior of their network.
• STS- and VT-level support (J1 and J2 bytes) verifies that the DS-3 and DS-1 circuits are correctly cross-connected.
• In-service upgrades from lower-density, 6-port transmultiplexer card (protected configurations).
Table 1 and Table 2 outline the specifications for the Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card.
Table 1. Regulatory Compliance
Electromagnetic Compliance - Class A
Telcordia Technologies Network Equipment Building Standards (NEBS) GR-1089-CORE, Issue 3 (Level 3, Type 2 and Type 4)
CISPR 22, CISPR 24
IC ICES-003 Issue 3, 1997
Telcordia Technologies NEBS GR-1089-CORE, Issue 3 (Level 3, Type 2 and Type 4)
DS-3, 44.736 Mbps ±0ppm, Telcordia GR-499-CORE and ITU-T G.703
DS-3: C-Bit, M23
DS-1: Extended super frame (ESF), D4, Unframed
Facilities per card
XC-VT or XC-10G cross-connect cards: 12 ports in all slots
XC-10G cross-connect card: 12 ports in all slots
XC-VT cross-connect card: 12 ports in slots 5, 6, 12, 13; 6 ports in slots 1 to 4 and 14 to 17
Slots 1 to 6, 12 to 17
1:N, N≤5 (ported operation)
Working slots: 1, 2, 4, 5, 6 or 12, 13, 14, 16, 17
Protect slots: 3 (A-side slots) and 15 (B-side slots)
1:N, N≤7 (portless operation)
Working slots: 1 to 6 and 12 to 17
Protect slots: 3 or 15 (protects both A-side and B-side slots, maximum of 7 slots)
0 to 225 ft
226 to 450 ft
DS-1 and DS-3 facility and terminal
Red "Fail" LED-hardware problem
Green/Amber "ACT/STBY" LED-identifies ACTIVE or STANDBY card state
Yellow "SF" LED-signal failure on line
12.65 x .716 x 9 in. (H x W x D)
Temperature and humidity
-40 to 149°F (-40 to 65°C), 5 to 95%, noncondensing humidity
-40 to 185°F (-40 to 85°C), 5 to 95%, noncondensing humidity
The Cisco ONS 15454 system requirements for operation of the transmultiplexer card are outlined in Table 3.
Table 3. System Requirements
Any version (cross-connect card dependent)
Release 5.0 or later (SONET)
Slots 1 to 6, 12 to 17
To place an order, visit the Cisco Ordering Home Page. Table 4 outlines the ordering code for the Cisco ONS 15454 12-Port DS-3 Transmultiplexer Card.
Table 4. Ordering Information
Cisco ONS 15454 SONET 12-Port DS-3 Transmultiplexer Card, 12 circuits, ported or portless operation, SONET system
SERVICE AND SUPPORT
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