CISCO DQOS PDF

Wherever possible, the PacketCable components and protocols build on existing protocols and infrastructures to simplify implementation and interoperability. All DOCSIS cable modems provide high-speed data connectivity to the Internet, while other cable modems can provide additional features, such as telephone connectivity. A typical CMTS services between several hundred and several thousand cable modems. Call management server CMS —A centrally located server that provides the signaling functions that allow MTAs to establish calls over the network. The CMS uses the Network-based call signaling NCS protocol to provide authentication and authorization, call routing, and support for special features such as three-way calling.

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To remove the call window configuration from the Cisco CMTS router, use the no form of this command: The following command example configures the call window on the Cisco uBR router to be 1 minute in length: Router config cable high-priority-call-window 1 PacketCable Network Components A PacketCable network contains a number of components. Wherever possible, the PacketCable components and protocols build on existing protocols and infrastructures to simplify implementation and interoperability.

All DOCSIS cable modems provide high-speed data connectivity to the Internet, while other cable modems can provide additional features, such as telephone connectivity. A typical CMTS services between several hundred and several thousand cable modems.

Call management server CMS —A centrally located server that provides the signaling functions that allow MTAs to establish calls over the network. The CMS uses the Network-based call signaling NCS protocol to provide authentication and authorization, call routing, and support for special features such as three-way calling.

A gate is a logical entity in the CMTS that ensures that a service flow is authorized for the QoS features it is requesting. A separate gate controls the upstream and downstream directions of a service flow.

The GC is also responsible for coordinating the creation of the two sets of gates at each end of the call so that the call can be authorized and established. Note A PacketCable network can contain multiple GCs, although only one server at a time is in control of any particular call.

Record keeping server RKS —Billing server that collects the information about each call as it is made. This prevents possible theft-of-service attacks and guarantees customers the services they are authorized to use.

Note PacketCable 1. This allows a bidirectional reservation process that ensures that resources are available at both endpoints of the connection before actually placing the call. After the resources are authorized, the CMTS reserves the local resources while it negotiates with the remote end for the resources that are required at that end.

Usage accounting and billing do not begin until the remote MTA picks up and the call is actually in progress. The DQoS model ensures that both endpoints of a call, as well as the backbone network, have reserved the same bandwidth, and that the bandwidth is reserved only while the call is in progress.

The CMTS communicates with the gate controller to coordinate the creation of matching gates at each side of the connection. Gates are unidirectional, so separate gates are required for the downstream and upstream traffic flows. The same gate ID, however, is usually used for the downstream and upstream gates for a call. For a typical call, gates progress through the following stages to create a DQoS traffic flow: The local MTA makes a call request, and the gate controller sends a Gate-Allocation command to the CMTS, which creates a gate in response and puts it into the Allocated state.

The call management server, which might be the same server as the gate controller, parses the call request to translate the destination phone number into the appropriate destination gateway.

The gate controller verifies that the MTA making the call request is authorized for the required resources and sends a Gate-Set command to the CMTS, which puts the gate into the Authorized state. The CMTS on each side of the connection reserves the local resources needed for the call, putting the gate into the Reserved state.

When both sides have reserved all required resources, each CMTS puts its gates into the Committed state, allowing traffic to flow.

The TAIDs must be unique and not incremented. This affects the uniqueness of the TAID. A TAID can be reused when the sender finishes a transaction. The uniqueness of TAID must be ensured to resolve the interoperability issue. A new TAID allocation algorithm is used to fulfill this requirement. It creates a TAID pool to replace the existing bit counter. A flag is assigned to each TAID in the pool to indicate its availability.

If the TAID is available, it is allocated to the new service flow, else the request is rejected. The dynamic service process keeps track of the timer.

The TAID pool is allocated and initialized at the process initialization. Additionally, the error codes returned from CMTS or its proxy are enhanced to include more specific information about gate operation failures. To enable this feature, use the packetcable gate send-subscriberID command in global configuration mode. Benefits The PacketCable feature offers the following benefits to service providers and their customers: Integrated Services on a Cable Network PacketCable allows cable operators the ability to offer multimedia, real-time services, in addition to data connectivity, across their entire network.

These services could include basic telephony with lifeline support, as well as telephony that offers competitive extended calling services. Operators can deploy new services while heavily leveraging their existing network infrastructures. The widespread use of IP as the standard transport mechanism for data networks today is enabling many advanced Internet applications such as multimedia e-mail, real-time chat, streaming media including music and video , and videoconferencing.

The PacketCable initiative provides the network architecture for a cable operator to deliver these services quickly and economically. Standardized Provisioning PacketCable provides a standardized, efficient method to provision IP services for individual subscribers, because PacketCable specifications define a uniform, open, and interoperable network.

Cable operators are assured of standardized provisioning and the associated lower costs of deployment. Interoperability Customer premises equipment CPE devices account for a major portion of the capital expense in deploying a VoIP solution at a cable plant. The PacketCable specifications ensure that vendors will build MTA clients that support the voice and other services that cable operators plan to deploy. Interoperability with the other components of the PacketCable network is also guaranteed because of the standards-based approach to the specifications.

Any PacketCable-certified component will be able to interoperate within a network that conforms to the PacketCable standards. The comprehensive, standards-based PacketCable specifications are designed to create a network that is as secure as the public switched telephone network PSTN. PacketCable networks will be able to provide the two types of information that a carrier must provide, depending on the type of court order: Call-identifying information—The carrier must provide the call-identifying information for calls to or from an intercept target.

For telephone calls, this information includes the phone numbers called by the target or calling the target. Call content—The carrier must provide the content of calls to or from an intercept target.

For telephone calls, this real-time content is the voice conversation. Each task is required unless otherwise identified as optional.

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Cisco Converged Broadband Routers Software Configuration Guide For DOCSIS

To remove the call window configuration from the Cisco CMTS router, use the no form of this command: The following command example configures the call window on the Cisco uBR router to be 1 minute in length: Router config cable high-priority-call-window 1 PacketCable Network Components A PacketCable network contains a number of components. Wherever possible, the PacketCable components and protocols build on existing protocols and infrastructures to simplify implementation and interoperability. All DOCSIS cable modems provide high-speed data connectivity to the Internet, while other cable modems can provide additional features, such as telephone connectivity. A typical CMTS services between several hundred and several thousand cable modems. Call management server CMS —A centrally located server that provides the signaling functions that allow MTAs to establish calls over the network. The CMS uses the Network-based call signaling NCS protocol to provide authentication and authorization, call routing, and support for special features such as three-way calling. A gate is a logical entity in the CMTS that ensures that a service flow is authorized for the QoS features it is requesting.

EARTH MATERIALS KLEIN PHILPOTTS PDF

CISCO DQOS PDF

To ensure secure NCS signaling, a dynamic key exchange is performed. Attempting to generate both types of records simultaneously can significantly degrade system performance. The content of the CDBs is outside the scope of this document. Description of the Event Message Feature EMs are real-time data records containing information about network usage and activities.

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