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3Com PathBuilder S200 Series Manual

Voice over ip switch
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3Com
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PathBuilder
S200 Series Switch
Voice Over IP

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Summary of Contents for 3Com PathBuilder S200 Series

  • Page 1 ® 3Com Corporation ™ PathBuilder S200 Series Switch Voice Over IP...
  • Page 2 Notice © 1998 3Com Corporation 5400 Bayfront Plaza ® Santa Clara, CA 95052-8145 (408) 326-5000 All rights reserved. Printed in U.S.A. Portions reprinted with the permission of Motorola, Inc. Restricted Rights Notification for U.S. Government Users The software (including firmware) addressed in this manual is provided to the U.S.
  • Page 3 Information and software in this document are proprietary to 3Com (or its Suppliers) and without the express prior permission of an officer of 3Com, may not be copied, reproduced, disclosed to others, published, or used, in whole or in part, for any purpose other than that for which it is being made available.

  • Page 5: Table Of Contents

    Voice Over IP Overview Introduction This document describes the Voice Over IP (VoIP) feature for 3Com’s PathBuilder S200 series switch Products. Note Parameters and applications for voice traffic are discussed in the manual. For information on SoTCP and serial data applications, refer to the IP and LAN Feature Protocol documentation.

  • Page 6: About Voice Over Ip (Voip)

    About Voice over IP (VoIP) What is VoIP? PathBuilder S200 series switch products support Voice over IP (VoIP) to provide termination and encapsulation of voice and fax traffic for transport over an IP network (see to Figure 1). 3Com’s proprietary protocol, Serial Protocol over TCP (SoTCP), provides the encapsulation mechanism for carrying voice traffic over an IP network.

  • Page 7: Network Topology

    • connects directly to the IP network. • connect directly to a frame relay network supporting voice. • encapsulates voice received from the voice device or network using 3Com’s SoTCP protocol. • initiates calls to the peer, the destination IP node.

  • Page 8: Sotcp Operation

    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 Format prefixes the traffic with a 3-byte SoTCP header or 4-byte SoTCP header, depending on the version of SoTCP protocol.

  • Page 9: Establishing A Call

    About Voice over IP (VoIP) Establishing a Call Introduction This section describes call establishments. Figure 4 shows the packets exchanged for session and connection establishment and finally, voice transfer. Voice Port Source IP Node Destination IP Node Voice Port ACP call request Open UDP channel TCP call request Session Setup...
  • Page 10 About Voice over IP (VoIP) Establishing a Before voice traffic can pass between the voice ports over the network, the source IP Session must establish a TCP and UDP session with the destination IP node. Each session is uniquely identified by a source IP address, destination IP address, source port number, and destination port number.
  • Page 11 About Voice over IP (VoIP) Stage Packet Transferred Description (continued) SoTCP Internal Call Once the destination IP node receives the Accept ACP call accept from the remote voice port, it sends a SoTCP Internal Call Accept to the source IP node. The remote port’s UDP port number is included in this packet to inform the other end of its UDP port number.

  • Page 12: Voip Applications

    PB S200 PB S200 Figure 6. VoIP Applications for Long Distance Telephone Service Figure 7 illustrates a network supporting voice within an Intranet and voice over a public or private frame relay network using 3Com’s Voice Relay. Frame Intranet Relay...

  • Page 13: Example Voip Configuration

    Configure the Voice Port and Voice Switching Table. LAN and IP Parameters: • Configure the LAN Port • Enable the PathBuilder S200 series switch Interface State • Configure IP Parameters • Configure IP Interfaces • Configure the Route Selection Table VoIP Parameters: •...
  • Page 14 VoIP Applications Configuration Figure 9 shows the parameters configured for each PathBuilder S200 series switch. Voice Voice Port Port Port Port IP Network Node 100 Node 200 Node Record Node Record Nodename: Node100 Nodename: Node200 Node Address: 100 Node Address: 200...

  • Page 15: Configuring Voip

    Configuring VoIP Configuring VoIP Introduction These sections describe how to configure the VoIP option. The parameters for the VoIP option are specified in three records: • “SoTCP Parameters” on page 12. • “Route Selection Table Parameters” on page 15. • “SoTCP Map Table Parameters” on page 16. Voice Over IP T0008-48/B Revision 5.2...
  • Page 16 Configuring VoIP SoTCP Parameters Navigating the CTP Figure 10 shows the CTP path to the SoTCP specific parameters. Node: Address: Date: Time: Menu: Main Logout Examine Configure Node: Address: Date: Time: Menu: Main Node Port SoTCP TCP Port Number Maximum Number TCP sessions Maximum Number of SVCs per session Maximum Total Voice SVCs Maximum Total Data SVC...
  • Page 17 Configuring VoIP Maximum Number of TCP Sessions Range 1 to 40 Default Description Specifies the maximum number of TCP sessions allowed through SoTCP. Once the maximum number is reached, no more sessions will be established and the “SoTCP-No more TCP sessions” alarm will be generated.
  • Page 18 Configuring VoIP Serial Connection Establishment Timeout Range 1 to 200. Specified in 50 ms increments. Default Description Specifies the time SoTCP waits for connection establishment with the serial device. When a node receives a call request from a source node, the SoTCP will send a Call Request packet to the serial protocol and waits for a Call Accept packet.
  • Page 19 Configuring VoIP Route Selection Table Parameters Parameters These Route Selection Table parameters should be configured: Note A table boot is required for changes to these parameters to take affect. Entry Number Range 1 to 16 Default Description Specifies the number used to reference this table record. Address Range 0 to 15 digits...

  • Page 20: Sotcp Map Table Parameters

    Configuring VoIP SoTCP Map Table Parameters Navigating the CTP Figure 11 shows the CTP path to the SoTCP map parameters. Node: Address: Date: Time: Menu: Main Logout Examine Configure Node: Address: Date:1 Time: Menu: Configure Node Port Configure Network Services Node: Address: Date:...
  • Page 21 Configuring VoIP Parameters These SoTCP map table parameters should be configured: Note A node boot is required for changes to these parameters to take affect. Entry Number Range 1 to 32 for PathBuilder S21x switch 1 to 64 for PathBuilder S24x, 26x, and 27x switch Default Description Specifies the number used to reference this table record.

  • Page 22: Statistics

    Statistics Statistics Introduction This section describes the statistics available for the SoTCP option. Types of Statistics You can generate these statistics: • SoTCP statistics • Detailed SoTCP statistics Navigating the CTP Figure 12 shows the CTP path to the SoTCP statistics. Node: Address: Date:...

  • Page 23: Sotcp Statistics

    Statistics SoTCP Statistics Example Figure 13 shows the SoTCP statistics screen. Node: Address: Date: Time: SoTCP Statistics Page 1 of 1 Transaction Summary: TCP Packets 1234567890 1234567890 Serial Packets 1234567890 1234567890 Slot Summary: Number of TCP sessions Number of Serial SVCs Number of Voice SVCs Total Number of SVCs Press any key to continue (ESC to exit)...

  • Page 24: Sotcp Detailed Statistics

    Statistics SoTCP Detailed Statistics Example Figure 14 shows the detailed SoTCP statistics screen. Node: NODENAME Address: blank Date: Time: SoTCP Detailed Statistics Page 1 of 1 TCP session : 1 of 1 SoTCP Version Number of SVCs : Current 12 Status : Wait Data UDP Port Number...
  • Page 25 Statistics Item Description (continued) Status Specifies the current state of the session. Status messages include: • Start • Idle • Wait Hdr • Wait Data • Abort The values mentioned apply to connection status. UDP Port Number Specifies the local port number when a voice SVC is present.

  • Page 27: Technical Support

    Information contained in this appendix is correct at time of publication. For the very latest, 3Com recommends that you access the 3Com Corporation World Wide Web site. Online Technical 3Com offers worldwide product support 24 hours a day, 7 days a week, through the Services following online systems: • World Wide Web site •...
  • Page 28 1 408 980 8204 Access by Digital Modem ISDN users can dial in to the 3Com BBS using a digital modem for fast access up to 56 Kbps. To access the 3Com BBS using ISDN, use the following number: 1 408 654 2703...
  • Page 29 If you are unable to contact your network supplier, see the following section on how to contact 3Com. Support from If you are unable to obtain assistance from the 3Com online technical resources or 3Com from your network supplier, 3Com offers technical telephone support services. To find out more about your support options, please call the 3Com technical telephone support phone number at the location nearest you.
  • Page 30 Returning Before you send a product directly to 3Com for repair, you must first obtain a Return Products for Repair Materials Authorization (RMA) number. Products sent to 3Com without RMA numbers will be returned to the sender unopened, at the sender’s expense.
  • Page 31 Index Numerics 3Com bulletin board service (3Com BBS) Serial Protocol over TCP, see SoTCP 3Com URL session establishment 3ComFacts SoTCP encapsulation mechanism operation packet format applications 2, parameters source IP node statistics bulletin board service maximum number of SVCs maximum number of voice...

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