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The Cisco ISR 3303 is a carrier-class SONET access device that combines the powerful routing features of Cisco IOS® with the ring access capabilities of a SONET Add/Drop Multiplexer (ADM). The Cisco ISR 3303 allows provisioning of native Time Division Multiplexing (TDM) services such as DS1 as well as next-generation, high-margin IP services using a single redundant platform deployed in the existing service provider access network.
Fiber is widely deployed in service provider access networks in metropolitan areas and additional deployment continues. However, today's SONET add-drop multiplexers are not designed to address the increasing demand for the dominant revenue-generating data services. Widespread deployment of these services prompts the need for IP-intelligent Customer Located Equipment (CLE). The Cisco ISR 3303 combines the features of a Cisco IOS based IP router and a SONET ADM in an integrated platform that can be deployed at the edge of the network. Service providers benefit from enhanced bandwidth utilization through the use of wideband packet over SONET technology. The ISR provides true TDM DS1 as well as IP-aware 10BaseT Ethernet ports for service delivery. A unidirectional path switched ring (UPSR) interface at OC-3 (155 Mbps) rate connects the ISR to the transport infrastructure. The Cisco ISR 3303 operates with a Stratum 3 clock with full support for synchronous status messaging (SSM). A unique auto-provisioning feature provides fast and easy system turn-up.
Designed to be used as a device that is deployed directly on the service provider network infrastructure, the ISR is based on accepted industry standards from ANSI, Bellcore, ETSI and ITU. The Cisco IOS based IP processing features fully comply with existing IETF RFCs as well as relevant IEEE standards. Lack of interoperability limits network growth to a single vendors' product offering, which is a huge limitation in times of rapid services growth.
The Cisco IOS software has emerged as the industry's accepted standard for internetworking at all points from the desktop to the Internet backbone. The Cisco ISR 3303 is another platform that leverages this functionality. Therefore, operations personnel trained on Cisco IOS software will find it very easy to provision and manage the Cisco ISR 3303 saving significant training costs for service providers. The SNMP-based agent software in the Cisco ISR 3303 supports standard MIBs and can be managed by the Cisco VisionWay Element Management System (EMS) or by other industry-standard applications such as HP OpenView.
| Feature | Description | Benefit |
|---|---|---|
| Highly Available System and Services | The system supports redundant system processors, redundant memories (for system program and data) and redundant Ethernet interface ports. Redundancy is also provided for system power, fans and the DS1 interfaces. | High system availability allows the carrier to differentiate service offerings from their competitors by providing highly reliable (99.999% availability) services to their end customers. |
| Effective Utilization of Access Bandwidth | Wideband POS maps data traffic into channelized payloads (i.e., wideband DS1/VT 1.5) as needed, versus the dedication of high bandwidth (broadband STS-1 and STS-3c) that most ATM solutions require. | Now data services and traditional TDM (T1) based services can be intermixed within the ring bandwidth, allowing effective utilization of access bandwidth, reducing services deployment costs. |
| Service-Level Monitoring of Data Traffic through the Network | The system allows the provider to monitor the health and statistics of data traversing the network. This includes service-level monitoring of the DS1s (end to end) that are used to carry the PPP and MLPPP frames | The carrier can monitor the state of the data services being offered end to end and provide SLAs based upon the quality of the network delivery. |
| Point-to-Network Service Deployment | The system uses standard PPP and MLPPP encapsulation of data services within DS1 payloads. | The data traffic can be managed by any standard SONET network element and terminate on any element that recognizes the DS1/MLPPP encapsulation of data (for example, another ISR or a router). |
| Data Transmission Across Carrier-to-Carrier Boundaries | Because PPP/MLPPP streams are encapsulated by framed DS1s, data services can be seamlessly transported across carrier-carrier interfaces in a multiple of formats: as an M13 DS3, within an STS-1, or as a (multiple if MLPPP) DS1. | This allows carriers to create and offer services beyond their traditional network boundaries. |
| Transport Layer Survivability | The system supports transport layer protection using either GR-1400 unidirectional path switching or GR-253 APS line switching. | The carrier can integrate the product into a SONET network and provide physical layer protection for higher service availability. |
| Automatic Smart Alarming and PM (ASAP) | The system automatically turns on performance monitoring and alarming when service is applied. | Traditional configuration of T1 services requires the carrier to provision the service twice. Once where the carrier validates the service (and then turns off alarming and PM) and again when the end-customer turns up service (where the carrier turns alarming and PM back on). With ASAP, service is only provisioned once. |
| Fast and Automatic System Turn-up | The system supports auto-provisioning allowing craft-persons to quickly install and provision the system for service. The craft mounts the system and connects the facilities, enters the system into service, and assigns a system name and IP address. Once this is done, ring service is up and all system provisioning can be performed from a remote operations center. | Faster service provisioning allows providers to quickly install and turn-up equipment for services delivery. |
| Integrated System Security | The system supports three security levels for system users: administrative, provisioning, and maintenance. | The system supports integrated security that prevents unauthorized craft and end-customers' access to the system. |
| Parameter | Intermediate Reach 1270-1380 nm IR-1 |
|---|---|
| Line Rate | 155.52 Mbps |
| Connector type | SC |
| Launch power (max.) | -8 dBm |
| Launch power (min.) | -15 dBm |
| Receiver power (max.) | -8 dBm |
| Receiver power (min.) | -31 dBm |
| Optical path power penalty | 1 dBm |
| Power budget | 16 dB |
| Maximum distance | 15 km |
Note: A typical single-mode optical cable has a transmission loss of 0.4-0.5 dB/km at the 1310 NM region. The splicing loss will be 0.2-0.3 dB each, and splicing will be made at every one to three kilometers (conduit) or two to five kilometers (direct burial).
Posted: Thu Mar 18 17:13:30 PST 1999
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