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This chapter provides a general overview of the Cisco 6015 DSLAM chassis, its hardware, supported line cards and other cards, and system requirements.
This chapter includes the following sections:
The Cisco 6015 system is part of the Cisco DSL product family that provides end-to-end service by carrying data between a subscriber home or office and a network, which can be managed by one of the following entities:
The Cisco 6015 system is also designed for use in multitenant/multiple dwelling units (MTU/MDUs).
The Cisco 6015 system sends and receives subscriber data (often Internet service) over existing copper telephone lines, concentrating all traffic onto a single high-speed trunk for transport to the Internet or a corporate intranet. Asymmetric digital subscriber line (ADSL) customer premises equipment (CPE) devices, which are connected to PCs or routers at the subscriber site, modulate data so that the data can travel over telephone lines to the Cisco 6015 digital subscriber line access multiplexer (DSLAM).
The Cisco 6015 is deployed with a standard network interface-2 (NI-2)-based network interface. The Cisco 6015 system uses the DS3+T1/E1 IMA (inverse multiplexing over ATM) NI-2 card.
The Cisco 6015 system includes the following hardware components:
Management software—Provisions and manages the Cisco 6015 system.
The main components of this management system include:
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.
The Cisco 6015 DSLAM chassis with an NI-2 card operates as follows:
The Cisco 6015 DSLAM chassis system has the following features:
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Note Cisco Systems supplies only the Cisco 6015 DSLAM chassis, Cisco 6015 supported cards, and the software applications. |
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Note The 8xDMT-2 line cards will be available in future Cisco 6015 releases. |
You can link up to 13 Cisco 6015 chassis so that they can be served by a single network trunk port. This configuration is called subtending. Subtending is economical because it reduces the number of ports needed in the aggregator or backhaul network to which the Cisco 6015s are connected.
Subtending is accomplished through the use of WAN interfaces. In a subtending arrangement, a WAN interface (on the NI card) connects each chassis to the chassis above it in the subtending hierarchy, or, if the chassis is at the top of the hierarchy, to the network trunk. One or more WAN interface connects each chassis to those below it in the hierarchy.
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Note Subtending refers to the host Cisco 6015 (called the parent) and subtended refers to downstream Cisco 6015 DSLAM (called the child) in a subtended network. In a subtended network, you can have a maximum of 13 Cisco 6015 chassis—1 subtending chassis and 12 subtended chassis. |
Three subtending configurations are possible:
See "Configuring Subtending Systems," for detailed information about subtending. Refer to the Cisco 6015 Hardware Installation Guide for more information about the hardware components and configuration specifications.
The Cisco 6015 chassis contains 38 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 8, 13 to 28, and 31 to 38.
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Note Slots 9, 12, 29, and 30 are reserved. To comply with NEBS requirements, blank faceplates should be installed on these, and all, empty card slots. |
An NI-2 card performs central processor, host, and system controller functions. Cisco IOS software controls and runs the NI-2 card. The NI-2 card is available in the following hardware configurations:
Network interfaces for DS3 type NI-2 cards are on the system I/O card. In the case of the OC-3 type, 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 6015s with NI-2 in a daisy chain configuration.
System I/O cards are also required on the OC-3 type Cisco 6015s to provide wire-wrap pins for dedicated CO facility OC-3 type NI-2 card operating alarms.
The Cisco 6015 system input/output (I/O) card performs the following tasks:
The ATU-C 1-4 DMT line card (referred to as 4DMT) is a discrete multitone modulation high-density line card. The 4DMT card contains four modems: two on the card motherboard and two on an attached daughterboard.
The 4DMT line card supports
The 4DMT line card is compatible with an NI-2 card running Cisco IOS software in Cisco 6015 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.
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 6015 DSLAM chassis through ports.
The ports in the Cisco 6015 DSLAM chassis are each 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: Tue Sep 5 09:13:56 PDT 2000
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