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ZyXEL Communications Omni.Net Lite 2.4.2 Multilink PPP (MP or MLP), 2.4.3 BACP and BAP

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Omni.Net Lite User’s Guide

Figure 5 Point-to-Point Link Pathway

2.4.2 Multilink PPP (MP or MLP)

There are two B channels in basic rate ISDN. This offers the possibility of opening multiple simultaneous channels between systems giving users additional bandwidth on demand. Multilink PPP is a method for bundling both B-channels into one PPP link for higher throughput.

Multilink PPP must be negotiated in the establish-link phase by both peers. If the negotiation is successful, the second link will be dialed after the first link reaches network phase. In some countries the directory number is not the same for both channels. For dialing the second B- channel with a different directory number, both numbers must be obtained before dialing out unless the peer supports BACP and BAP, which will be described later in this chapter. Multilink PPP is described in RFC-1990.

2.4.3 BACP and BAP

Bandwidth Allocation Control Protocol (BACP) and Bandwidth Allocation Protocol (BAP) is used for call request and link drop under Multilink PPP.

BACP is negotiated during the network phase. Without BACP/BAP, the directory numbers of both B-channels must be specified before dialing out. In some cases, it is not possible for the ISP to support more than one chassis that is capable of bundling both channels at the same time. With BACP/BAP, the second B-channel directory number can be obtained while requesting a call. The second directory number is not necessary any more.

29	Chapter 2 Using the Utility

Contents

User’s Guide Page Copyright Disclaimer Trademarks Federal Communications Commission (FCC) Interference Statement Notice Certifications Safety Warnings ZyXEL Limited Warranty Note Online Registration Customer Support Page Table of Contents Using AT Commands Using Tone Commands Page List of Figures Page List of Tables Page Preface About This User's Guide Related Documentation User Guide Feedback Syntax Conventions Page Introduction 1.1 About your TA 1.1.1 TA Features 1.1.1.1 ISDN Basic Rate Interface (BRI) Support 1.1.1.2 Extensive Analog Phone Support 1.1.2 TA and ISDN Interfaces 1.2 TA Hardware and Driver Installation 1.3 Top Panel LEDs 1.4 Configuration Methods Page Page Using the Utility 2.1 Accessing the TA with the Utility Default Settings Query from TA 2.2 Navigating the Utility 2.3 System 2.4 RS-232Port: Local DN (Directory Number) and Call Type 2.4.1 Introduction to PPP 2.4.2 Multilink PPP (MP or MLP) 2.4.3 BACP and BAP 2.4.4 ISDN Protocols 2.4.5 Configuring Local DN and Call Type Page 2.5 RS-232Port: PPP/MP Parameters 2.5.1 Link Authentication 2.5.1.1 Windows Authentication Page 2.5.2 Call Bumping (Bandwidth Release) for Voice Calls 2.5.3 Bandwidth On Demand (BOD) 2.5.4 Configuring PPP/MP Parameters 2.6 RS-232Port: V.24 Signal 2.6.1 RS-232Flow Control 2.6.2 Configuring V.24 Signal 2.7 Incoming Call Screening 2.8 Outgoing Call Screening 2.9 Pre-storedNumbers 2.10 RS-232Port: Advance Setting Page 2.11 Analog Port: Local DN and Options 2.11.1 MSN (Multiple Subscriber Number) and Subaddress 2.11.1.1 Phone Number Assignment Example 2.11.2Caller ID 2.11.2.1 Type 1: On-hookCaller ID Transmission 2.11.2.2 Type 2: Off-hookCaller ID Transmission 2.11.3 Dialing Method 2.11.4 Configuring Local DN and Options 2.12 Voice Calls 2.12.1 Placing a Voice Call 2.12.2 Answering a Voice Call 2.12.3 Intercom 2.12.4Supplementary Services 2.12.4.1 The Flash Key 2.12.4.2 Call Hold 2.12.4.3Call Waiting 2.12.4.4 Call Transfer 2.12.4.5Three-WayConference Using AT Commands 3.1 AT Commands Overview 3.2 Accessing the TA Example Connection Description Connect To COM Properties DTR 3.3 AT Commands 3.3.1 Data Command Sets Page Page Page 3.3.2 Command Sets for Analog Ports Page 3.3.3 Debug Command Sets 3.4 Configuring Examples with AT Commands 3.4.1 Phone Number Assignment 3.4.2 Storing Phone Number 3.4.3 Setting Ports Priority 3.4.4 Disabling Call Waiting 3.4.5 Link Authentication 3.4.6 Call Bumping (Bandwidth Release) for Voice Calls 3.4.7 Bandwidth On Demand (BOD) 3.4.8 Incoming Call Screening 3.4.8.1 Data Call 3.4.8.2 Voice Call 3.4.9 Outgoing Call Screening 3.4.9.1 Data Call 3.4.9.2 Voice Call 3.4.10 Caller ID 3.5 Result Codes Page Using Tone Commands 4.1 How to Use Tone Commands with a Telephone Keypad 4.1.1Tone and Ring Patterns 4.2 Tone Commands 4.3 Configuring Example with Tone Commands 4.3.1 Phone Number Assignment 4.3.2 Storing Phone Number 4.3.3 Setting Ports Priority 4.3.4 Disabling Call Waiting 4.3.5 Incoming Call Screening 4.3.5.1 Voice Call Firmware Upgrade 5.1 Upgrading Using the Utility 5.2 Upgrading Using HyperTerminal Example Transfer Send File 1K Xmodem Browse Send Page Page Troubleshooting Page Numerics Index