3Com S200 manual SoTCP Operation, Mechanism, Transport Traffic Carried Description Layer

Page 8

About Voice over IP (VoIP)

SoTCP Operation

Introduction

This section describes the operation of SoTCP protocol. SoTCP provides the

 

encapsulation method for carrying voice traffic over an IP network.

SoTCP Packet The SoTCP protocol terminates voice traffic received from a voice device and

Formatprefixes the traffic with a 3-byte SoTCP header or 4-byte SoTCP header, depending on the version of SoTCP protocol. Figure 3 illustrates the SoTCP packet.

3 or 4 Byte SoTCP Header

Data

 

Figure 3. SoTCP Packet Format

 

The SoTCP header contains information that will allow a destination IP node to

 

reconstruct the voice packet at the remote end.

Transport

 

To carry voice traffic over IP, SoTCP uses two Transport layer protocols, the

Mechanism

Transport Control Protocol (TCP) and User Datagram Protocol (UDP).

Transport

Traffic Carried

Description

Layer

 

 

Protocol

 

 

 

 

 

TCP

Voice Signalling Traffic

SoTCP uses TCP to carry voice signalling

 

 

traffic because TCP provides reliable,

 

 

sequenced packet delivery. Voice

 

 

signalling traffic encapsulated by SoTCP

 

 

must arrive at the destination node without

 

 

error or delay. TCP implements error

 

 

recovery for duplicate or lost packets.

 

 

 

UDP

Audio and Fax

SoTCP transports audio and fax traffic

 

 

over UDP session. Unlike TCP, UDP

 

 

provides fast and simple transaction

 

 

services with minimal protocol overhead.

 

 

UDP provides a best-effort, transport

 

 

mechanism only and does not ensure

 

 

reliable delivery.

 

 

 

Each TCP or UDP session may carry multiple switched virtual circuits (SVCs).

SoTCP uses SVC call setup and routing procedures to establish voice SVCs.

4

Voice Over IP

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Contents 3Com Corporation Restricted Rights Notification for U.S. Government Users Restricted Rights LegendProprietary Material Page Overview IntroductionFeatures About Voice over IP VoIPConvention Description Network TopologyIntroduction SoTCP Operation TransportMechanism Transport Traffic Carried Description LayerEstablishing a Call Session and Connection EstablishmentStage Packet Transferred Description Stage Packet Transferred Description VoIP Applications ApplicationsStep Description Example VoIP ConfigurationConfiguration Configurable Parameters to support VoIP Configuring VoIP SoTCP Parameters Descriptions TCP Port NumberMaximum Number of TCP Sessions Maximum Number SVCs per SessionMaximum Total Voice SVCs Maximum Data SVCsTCP Keep Alive Timer Serial Connection Establishment TimeoutTCP Connection Establishment or Clearing Timeout Route Selection Table Parameters ParametersEntry Number AddressSoTCP Map Table Parameters SoTCP Map Table ParametersDestination Address Destination IP AddressStatistics Statistics ScreenDescription SoTCP StatisticsExample SoTCP Detailed Statistics SoTCP Detailed StatisticsDescription Page Technical Support Access by Analog Modem 3ComFacts Automated Fax ServiceAccess by Digital Modem Country Data Rate Telephone NumberCountry Telephone Number Support from3Com Country Telephone Number Fax Number Index Numerics
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S200 specifications

The 3Com S200 is a cutting-edge networking solution designed to meet the demands of small to medium-sized businesses. Renowned for its reliability and performance, this switch offers seamless integration and enhances network efficiency through advanced features and technologies.

One of the standout features of the 3Com S200 is its versatility. With a variety of ports ranging from 8 to 48, the switch provides ample connectivity options for various devices. This flexibility makes it an ideal choice for businesses aiming to expand their network without the need for extensive infrastructure changes. Built-in support for Power over Ethernet (PoE) enables users to connect and power devices such as IP phones and cameras, simplifying wiring and installation.

Performance is another key characteristic of the 3Com S200. Equipped with Layer 2 switching capabilities, the S200 allows for intelligent traffic management and efficient data handling. It supports advanced features like VLAN tagging, which facilitates network segmentation, improving security and performance. Additionally, the switch boasts a user-friendly interface that enables streamlined management, making network monitoring and configuration easily accessible even for non-technical staff.

The durability and reliability of the 3Com S200 are further enhanced by its robust design. Built to handle the rigors of a business environment, the switch features a fanless design for quiet operation, making it suitable for office use where noise may be an issue. With energy-efficient technology, the S200 not only minimizes power consumption but also contributes to cost savings over time.

Security is a priority for modern networks, and the 3Com S200 excels in this area. It offers features such as port security and access control lists to protect sensitive data and manage user access. Moreover, support for SNMP (Simple Network Management Protocol) facilitates proactive network management and monitoring, allowing businesses to address potential issues before they escalate.

In conclusion, the 3Com S200 stands out as a reliable, efficient, and secure networking solution. With its versatile port options, Layer 2 capabilities, user-friendly management interface, and robust security features, it is an excellent choice for businesses looking to enhance their network infrastructure. Whether scaling operations or optimizing current performance, the 3Com S200 provides the technology and reliability needed to thrive in today’s digital landscape.