ANSI SCTE 24-11 pdf free download
ANSI SCTE 24-11 pdf free download.IPCablecom 1.0 Part 11: Internet Signaling Transport Protocol (ISTP).
5 OVERVIEW AND BACKGROUND MOTIVATION
5.1 Document Overview
This document describes an lPCahlecom protocol for interworking IP and SS7 networks to support voice-over-IP
(VoIP) PSTN Gateways and Controllers, meeting commonly accepted quality, performance and reliability
requirements. The IPCablecom protocol described in this document will be referred to as the IPCablecom Internet
Signaling Transport Protocol (I STP) protocol.
This document is structured in the following main sections:
• The overview provides a high level introduction to the protocol. In addition, it describes the motivation for developing ISTP and a summary of the underlying goals and assumptions for its design.
• The architecture section describes a model of the networks, elements, and nodes of the IP and SS7 networks, and the relationships between the elements of the networks.
The functional areas section describes the required capabilities in the areas of:
• Address and name mapping between the SS7 and IP networks, and relationships between important identifiers.
• Message distribution to network applications and nodes.
• ISTP level initialization, recovery, validation, monitoring, alarm management, congestion control, performance, security, and configuration.
• Management of lower layers, including session establishment and recovery without causing duplication of messages and other errors.
• The protocol description section presents the actual ISTP messages, including encoding of the parameters, which are based on binary formats. Associated with messages are the procedures that will be required for an ISTP implementation.
• The appendices contain a TCP and a SCTP implementation guide, example call flows, a list of IPCablecom interface specifications, and acknowledgements.
5.2 Service Goals
Cable operators are interested in deploying high-speed data and multimedia communications services on cable television systems. Various cable operators, have prepared a series of interface specifications that permit the early definition, design, development, and deployment of packetized data-based services over cable systems on an uniform, consistent, open, non-proprietary, multi-vendor interoperable basis. The intended system enables Internet Protocol (IP) based voice communications, video, and data services to be provided to the customer over an allcoaxial or hybrid-fiber/coax (HFC) cable access network by utilizing the data over cable service interface specification (DOCSIS) standard as the basic foundation for data transport. This is shown in simplified form in Figure I.
5.3 IPCablecom Reference Architecture
The conceptual diagram in Figure 2 portrays a high level architectural view of the IPCablecom network.
Subscriber equipment consists of a Media Terminal Adapter (MTA), the primary purpose of which is to provide a gateway between the subscriber-side voice/video media devices and the rest of the IPCablecom network. Two types of MTAs exist. The first is a standalone MTA which connects via a local area network (LAN) interface (e.g., IEEE 802.3) to a DOCSIS cable modem. The second is an embedded MTA, which integrates the standalone MTA functions with the DOCSIS cable modem (CM) media access control (MAC) and physical layer (PHY) functions in the same physical package.
Physical connectivity to the backbone consists of an all-coax or a hybrid fiber-coax (HFC) DOCSIS enabled cable access network with DOCSIS I. I quality-of-service (QoS). The DOCSIS HFC access network terminates at the head end Cable Modem Termination System (CMTS). The CMTS provides either a bridging point or a routing point to the backbone managed IP network.
The call management server (CMS) provides control, routing, and signaling services in connection with voice communications provided via IPCablecorn. It is responsible for authorization and plays a roll in feature implementation. The media servers provide support services for media streams such as conference mixing bridges and announcement servers.ANSI SCTE 24-11 pdf download.
