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This chapter provides a general overview of the concepts used in the Cisco 6160 DSLAM (hereafter referred to as the Cisco 6160 or Cisco DSLAM chassis), and CDM software system. The Cisco 6160 provides end-to-end service by handling voice or data traffic, or both, between a subscriber home or office, a telephone central office (CO) facility, and various networks. CDM software provides a means for you to manage the elements on the Cisco 6160 network.
The main components of a Cisco 6160 CDM system include a Cisco 6160 DSLAM with a network interface type 2 (NI-2) card, a local SUN workstation (CDM server), CDM software, and optional remote SUN workstations (CDM clients).
Figure 1-1 shows a typical deployment and interconnection example for the Cisco DSLAM, in which it is connected to a Cisco 6400 Universal Access Concentrator (UAC) system.
Features of the main components of a Cisco 6160 CDM system include:
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Note Cisco Systems supplies only the Cisco 6160 chassis, Cisco 6160 supported cards, and the software applications. |
The Cisco 6160, with an NI-2 card, operates as follows:
The Cisco 6160 provides the following features:
You can link up to 13 Cisco 6160 chassis so that they can be served by a single network trunk port. This is called subtending. Subtending saves money by reducing the number of ports needed in the aggregator or backhaul network to which the Cisco 6160s are connected.
Subtending is accomplished through the use of WAN interfaces. In a subtending arrangement, each chassis is connected by a WAN interface to the chassis above it in the subtending hierarchy, or, if the chassis is at the top of the hierarchy, to the network trunk. Each chassis is connected by one or more WAN interfaces to those below it in the hierarchy.
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Note Subtending refers to the host Cisco 6160 and subtended refers to downstream Cisco 6160 chassis in a subtended network. In a subtended network, you can have a maximum of 13 Cisco 6160 chassis: 1 subtending chassis and 12 subtended chassis. |
Two subtending configurations are possible:
Refer to the Cisco 6160 Hardware Installation and Troubleshooting Guide for detailed information about subtending.
The Cisco 6160 chassis contains 34 card slots. Slots 10 and 11 are reserved for NI-2 cards. You can insert any other Cisco supported line cards in slots 1 to 9 and 12 to 34.
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Note To comply with NEBS requirements, blank faceplates should be installed in all empty card slots. |
An NI-2 card performs central processor, host, and system controller functions. The NI-2 card runs and is controlled by Cisco IOS software. The NI-2 card is available in several hardware configurations:
Network interfaces for DS3 type NI-2 cards are on the system I/O card. In the case of the OC-3 and OC-3/DS3 types, the NI-2 card faceplate provides the required network optical interfaces. The NI-2 card performs the following tasks:
The DS3 type NI-2 card operates in conjunction with network interfaces supplied by BNC connectors on the system I/O card. A system I/O card supports the following tasks:
The OC-3 type single mode and multimode NI-2 cards operate in conjunction with network interfaces supplied by optical interface connectors on the OC-3 type NI-2 card faceplate. OC-3 type NI-2 card faceplates have two optical connector pairs that perform the following tasks:
The single mode and multimode OC-3 type NI-2 cards support the aggregation of up to 12 additional subtended OC-3 type Cisco 6160s with NI-2 in a daisy chain configuration.
System I/O cards are also required on the OC-3 type Cisco 6160s to provide wire-wrap pins for dedicated CO facility OC-3 type NI-2 card operating alarms.
The OC-3/DS3 type single mode and multimode NI-2 card operates in conjunction with network interfaces supplied by BNC connectors on the system I/O card and the optical interface connectors on the NI-2 card faceplate.
The OC-3/DS3 type NI-2 card has the same connectors and performs the same tasks described in the DS3 Configuration and OC-3 Configuration sections.
The Cisco 6160 system input/output (I/O) card performs the following tasks:
The ATUC-1-4DMT card (hereafter referred to as 4DMT) is a discrete multi-tone (DMT) modulation high-density line card. The 4DMT card contains four modems: two on the card motherboard and two on an attached daughter board.
The 4DMT line card supports
The 4DMT line card is compatible with an NI-2 card running Cisco IOS software in Cisco 6160 DSLAMs with NI-2. The NI-2 card is an advanced controller that operates the 4DMT card in the enhanced data serial bus (DSB) mode. The 4DMT card supports full ADSL rates on all four modems.
The four port CAP/DMT Flexi card (hereafter referred to as 4Flexi) provides four subscriber lines that you can configure as either carrierless amplitude modulation/phase modulation (CAP) or discrete multitone (DMT), T1.413 Issue 2-compliant ATUC lines. CAP and DMT lines both support ADSL connections over POTS or direct connections. The card supports maximum data rates of 8032 kbps downstream and 864 kbps upstream on all four ports simultaneously. The faceplate of the four port Flexi line card is marked 4X FLEXI.
The four port SDSL (symmetrical digital subscriber line) card (hereafter referred to as 4SDSL) provides four SDSL subscriber lines. The card supports maximum data rates of 1168 kbps downstream and 1168 kbps upstream on all four ports simultaneously. The faceplate of the four port SDSL line card is marked 4X SDSL 2B1Q.
Ports are the means by which traffic is routed across the network, and services are connected within a system. In other words, traffic enters and exits the Cisco 6160 through ports.
The ports in the Cisco 6160 are defined by a port address. A port address is a logical identifier assigned to each network interface and line card. The system controller assigns port addresses when a card is entered into the system database.
Posted: Sat Jul 29 06:51:20 PDT 2000
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