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The 6100 System Components

The 6100 System Components

This chapter explains the Cisco 6100 system components and provides examples of some of the ways to configure the system components. Block diagrams for most of the major system components can be found in the "6100 System Block Diagrams" appendix.

2.1 The 6100 Chassis

The chassis that can make up a 6100 system include:

See Figure 2-1 for an illustration of the three main chassis. Each slot on the chassis is numbered along the top of each chassis. In this manual, the slot numbers are numbered on the modules for ease of reference and readability. These slots will be referred to in subsequent sections of this chapter.

Note Filler faceplates may be purchased for empty MC, LCC, and PSC card slots. Filler faceplates are required by UL 1950, Issue 3, safety requirements.

Figure 2-1: Cisco 6100 Major Components


2.2 Multiplexer Chassis

The 6100 MC consists of 38 slots. These slots contain the following:

Note Digital Off-Hook (DOH) and direct connect configuration styles are supported currently. The DOH entry-level configuration style will be available in a future release of the 6100.

Figure 2-2 identifies the slots on the MC.


Figure 2-2: Multiplexer Chassis


The ATU-Cs can be oversubscribed by adding LIMs to the MC, or by adding one or more separate LCCs containing LIMs to the system, again depending on the configuration style.

One 6100 can serve up to 400 subscribers depending on the concentration ratio achieved through the addition of LIMs, either to the LCC or to the MC itself. The concentration ratio can be dynamically updated in the field by changing the number of LIMs and ATU-Cs in the system. See the "Adding Cisco 6100 Hardware" chapter for more information on how to expand your Cisco 6100 system.

The following sections discuss the various components that may be included in the MC.

2.2.1 System Controller

The SC module is the central processing and control system for the main access MC and any attached LCCs. The SC contains all software required to perform provisioning, performance monitoring, control, status, management, and alarm reporting. Alarm relay contacts on the multiplexer back panel for critical, major, and minor alarms are also managed by the controller. Up to two SCs can be added for redundancy.

Statistics management

The SC continuously compiles statistics on ATU-C usage and reports these statistics over both an SNMP-based Ethernet and a craft interface. A local RS-232 craft port is located on the front panel of the controller. A 10Base-T Ethernet port is located on the rear of the unit for SNMP-based management. Through the management ports, alarms and SNMP traps alert the service provider to alarm conditions. For more information on statistics management, see the ViewRunner for Windows Provisioning and Operation Manual.

Software

The software on the SC is stored in Flash memory and may be updated dynamically via TFTP protocol over the 10BaseT Ethernet port or the craft port while in service (if redundant controllers are used). All provisioning information is stored in local nonvolatile memory. In the event of a power loss, this information is retained by the system.

Redundant controllers

A single SC is sufficient to operate the 6100 system; however, redundant controllers may be installed to achieve a higher level of fault tolerance. When two controllers are installed, the primary controller assumes the active role while the secondary controller enters standby mode. The standby controller continuously monitors all system activity and checks the operational decisions of the active controller. If a secondary controller detects a fault in the primary one, it automatically removes the active controller from the bus and assumes active control. The faulty controller becomes inactive and an alarm is generated by the new active controller.

Note Redundant controllers will be available in a future release of the 6100 system.

2.2.2 Network Interface Modules

The NI module provides a high-speed connection for aggregated data traffic from the ATU-Cs. The NI connects to the ATU-Cs via point-to-point serial data buses on the backplane. The NI must be plugged into slot 10 for the serial connections to be made, until redundant NI support is made available. A high-speed interface to the STMs is also provided which is internal to the system via the backplane.

Types of NI modules

Three types of NIs are provided with the 6100: OC3c ATM multi-mode, OC3c ATM single mode intermediate reach, and DS3 ATM.

Redundant NI modules

A single NI module is sufficient to operate the 6100 system; however, dual NI modules may be installed to achieve a higher level of fault tolerance.

Note Redundant NI modules will be available in a future release of the 6100 system.

2.2.3 Subtending Module

For subtending 6100s, a DS3 STM is placed in slot 9 of the MC. It handles subscribers coming from subtended 6100s. Subtending is the service and aggregation of data from one or more remotely located units into a host unit in order to fully take advantage of the data network interface on the host unit. Subtending provides additional benefits by reducing the number of ATM edge switch ports required to terminate the 6100 systems.

In this manual, the term "subtending" refers to the host 6100 node, and "subtended" refers to the downstream 6100 node in a subtended network. See the "Installation - Subtended Network" chapter for more information on subtending.

Redundant subtending modules

A single STM is sufficient to operate the subtending host 6100 system; however, dual STMs may be installed to achieve a higher level of fault tolerance.

Note Redundant STMs will be available in a future release of the 6100 system.

2.2.4 ATU-C Modules

Dual ATU-C modules contain two ADSL modem connections. Each module converts ADSL modulation from the line into digital data streams to and from the multiplexer NI module. The line rate is negotiated when the ATU-C trains with the ATU-R, based on line quality and distance. If provisioned, the ADSL ATU-C rate adapts to the maximum bit rate negotiable on the line.

The MC may include up to 32 dual ATU-C modules for a total of 64 ADSL modems. The modems are separated into physical modem pools A and B as shown in Figure 2-2. These pools are associated with physical pools A and B on the LCC as shown in Figure 2-3. Depending on the concentration achieved through the addition of LIMs, up to 400 subscribers may be served by a fully-populated MC. This ratio may be dynamically updated in the field by changing the complement of LIMs and ATU-Cs in the system. See the "Adding Cisco 6100 Hardware" chapter for more information on expanding the 6100 system.

2.2.5 MC Component Information

The following table lists the places in this manual where information about the MC can be found.


Table 2-1: Multiplexer Chassis and Component Information
General Topic Document Location

Multiplexer Chassis Description

"Multiplexer Chassis" section;
Figure 2-2;
Table 2-1.

Chassis Slot Configurations

"Digital Off-Hook Standard Configuration" section;
Figure 3-1;
Table 3-1;
"Digital Off-Hook (Entry-Level Configuration)" section;
Figure 3-3;
Table 3-4;
"Direct Connect Configuration" section;
Figure 3-4;
Table 3-6.

Chassis Connectors

"Multiplexer Chassis Connectors" section.

Rear Panel Connectors and Switches

Figure 4-1;
Table 4-3.

Installation Procedures

"Installation - DOH Standard" chapter;
"Installation - DOH Entry-Level" chapter;
"Installation - Direct Connect" chapter;
"Installation - Subtended Network" chapter.

Cable Configurations

"Cabling Configuration - DOH Standard" section;
Figure 5-1;
"Cabling Configuration - DOH Entry-Level" section;
Figure 6-1;
"Cabling Configuration - Direct Connect" section;
Figure 7-1.

Cable and Part Numbers

Table 5-1;
Table 6-1;
Table 7-1.

Cables and Connector Pinouts

"Multiplexer Cables and Connectors" section;
Figure A-1 through Figure A-8;
Table A-1;
Table A-2;
Table A-3;
Table A-9.

Part Numbers

"NetSpeed/Cisco Part Number Conversion" appendix

2.3 Line Concentration Chassis (LCC)

The LCC expands the line capability of the MC. Each LCC supports up to 20 LIMs. Each LIM can support four subscriber lines for a total of 80 subscriber lines per chassis. Electrically, the Cisco 6100 can support up to five LCCs, for a total of 400 lines. The LCC also be configured with either single or redundant LIM controllers (LCs). LIMs and LCs are discussed in the following sections.

Note  Redundant LIM controllers will be available in a future release of the 6100.

Figure 2-3: Line Concentration Chassis


2.3.1 LIMs

LIMs provide intra-office protection, DOH detection, line concentration, and switching circuitry. Each network element must have protection from electrical problems from major electrical events; for example, lightning strikes. Each LIM is equipped with internal circuitry for intra-office protection to prevent electrical overload in the case of faulty wiring and other inside plant accidental occurrences. Secondary protection from outside plant electrical faults is provided within the PSC. See the "PSC Cabling to the Main Distribution Frame" section for more information.

Each LIM contains intra-office protection for the connection to the PSC for four lines. LIMs are required when it is necessary to oversubscribe (or concentrate) lines to ATU-C ports in the MC. Lines can be concentrated by adding LIMs to the main MC or by adding a separate LCC containing LIMs. As shown in Figure 2-2 and in Figure 2-3, LIMs are associated with physical modem pools A and B in the MC.

Note There is an important distinction in the 6100 operation between physical and logical pools. Please refer to the ViewRunner for Windows Provisioning and Operation Manual for an in-depth discussion of this topic.

2.3.2 LIM Controller

The LIM controller provides communication between the SC module in the MC and the LIMs in the LCCs. It also provides power for the LIMs. The LIM controller detects active/inactive lines and communicates that information to the SC module.

Note  In future the 6100 releases, redundant LIM controllers may be installed to achieve fault tolerance.

2.3.3 LCC Component Information

The following table lists the places in this manual where information about the LCC can be found.


Table 2-2: Line Concentration Chassis and Component Information
General Topic Document Location

Line Concentration Chassis Description

"Line Concentration Chassis (LCC)" section;
Figure 2-3;
Table 2-2.

Chassis Slot Configurations

"Digital Off-Hook Standard Configuration" section;
Figure 3-1;
Table 3-2.

Chassis Connectors

"Line Concentration Chassis Connectors" section.

Rear Panel Connectors and Switches

Figure 4-2;
Table 4-4.

Installation Procedures

"Installation - DOH Standard" chapter.

Cable Configurations

"Cabling Configuration - DOH Standard" section;
Figure 5-1.

Cable and Part Numbers

Table 5-1.

Cables and Connector Pinouts

"LCC Connectors" section;
Figure A-9 through Figure A-12;
Table A-4;
Table A-5;
Table A-9.

Part Numbers

"NetSpeed/Cisco Part Number Conversion" appendix

2.4 POTS Splitter Chassis

Subscriber lines that carry a combined POTS/ADSL signal from the customer premises must terminate at the PSC. The PSC can contain up to 20 POTS splitter modules. These modules provide secondary line protection and separate the ADSL data from the POTS signals.


Figure 2-4: POTS Splitter Chassis


2.4.1 PSC Cabling to the Main Distribution Frame

Separate 50-pin CHAMP connectors are provided to cable the POTS signals to co-located voice switching equipment via the central office main distribution frame (MDF). Special cables are needed for this connection. These cables can be obtained from Cisco or may be built according to the Nortel NT-T100 series cable specification.

POTS frequencies are sent to the voice switch while ADSL frequencies are routed to the LIMs or dual ATU-C modules, depending on the configuration. The PSC is electrically passive; in other words, a complete loss of power to the 6100 system will not affect voice transport to the Public Switched Telephone Network (PSTN).

2.4.2 PSC Component Information

The following table lists the places in this manual where information about the PSC can be found.


Table 2-3: POTS Splitter Chassis and Component Information
General Topic Document Location

POTS Splitter Chassis Description

"POTS Splitter Chassis" section;
Figure 2-4;
Table 2-3.

Chassis Slot Configurations

"Digital Off-Hook Standard Configuration" section;
Figure 3-1;
Table 3-3;
"Digital Off-Hook (Entry-Level Configuration)" section;
Figure 3-3;
Table 3-5;
Table 3-3;
Figure 3-4;
Table 3-7.

Chassis Connectors

"POTS Splitter Chassis Connectors" section.

Rear Panel Connectors and Switches

Figure 4-3;
Table 4-5.

Installation Procedures

"Installation - DOH Standard" chapter;
"Installation - DOH Entry-Level" chapter;
"Installation - Direct Connect" chapter.

Cable Configurations

"Cabling Configuration - DOH Standard" section;
Figure 5-1;
"Cabling Configuration - DOH Entry-Level" section;
Figure 6-1;
"Cabling Configuration - Direct Connect" section
Figure 7-1.

Cable and Part Numbers

Table 5-1
Table 6-1;
Table 7-1.

Cables and Connector Pinouts

"POTS Splitter Chassis Connectors" section;
Figure A-13 through Figure A-14;
Table A-6;
Table A-7;
Table A-8;
Table A-9.

Part Numbers

"NetSpeed/Cisco Part Number Conversion" appendix


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Posted: Tue Nov 16 09:02:37 PST 1999
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