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Summary of Contents for Compaq W25
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Page 1: Ericsson W25
Ericsson W25 Fixed Wireless Terminal for WCDMA/HSPA Mobile Networks Application Note: Fax over IP with Ericsson W25... -
Page 2: Table Of Contents
...8 ECURITY ...8 EDIA TREAM Jitter Buffer...8 Echo Canceller...9 QoS...9 ...9 NTEROPERABILITY W25 CONFIGURATION ...10 ...10 AX SERVICE IMS User Agent...10 IMS Call Server...11 IMS Media Codec ...12 VoIP timer ...14 REFERENCES ...15 ACRONYMS AND ABBREVIATIONS...16 APPENDIX A ...17 2/221 02-FGB 101 327 Uen B – November 2007... -
Page 3: Introduction
Introduction This document gives a brief description of the Fax over IP and the implementation in the Ericsson W25. It also includes a guidance of how to configure the Ericsson W25. Background The Ericsson W25 is intended for residential and SOHO applications. The focus for the Ericsson W25 is to enable both broadband data and voice calls using existing 3G network. -
Page 4: System Overview
Ericsson W25 and the other fax to the PSTN. The Ericsson W25 has a SIP User Agent associated to the fax port. The User Agent registers in the SIP server. The User Agent originates and terminates the FoIP (Fax over IP) calls and use the SIP protocol to manage and control the media streams (T.38). -
Page 5: Oip Network
VoIP network The basic building blocks for Voice and Fax over IP are a SIP server and a PSTN gateway with T.38 support. Sometimes the PSTN gateway might consist of two units; Media Controller and Media Gateway. Normally a Session Border Controller (SBC) is used to handle security. 2.2.1 SIP Server The SIP server is the heart of VoIP system. -
Page 6: Session Border Controller (Sbc)
When sending a fax from a fax-machine connected to the W25, the off- hook status as well as the called number (B-subscriber)is detected by the W25. This is included in a INVITE-message which is sent to the SIP server. The SIP server forwards the INVITE to the appropriate fax gateway, which then calls subscriber B on the PSTN. -
Page 7: And T30 Protocol
80 kbps. Access Network The access network used for transmitting fax pages to and from the Ericsson W25 is the WCDMA/HSDPA Radio access network and belonging core network. IP packets are sent in packet switch data channels over the radio network. -
Page 8: Ericsson W25
Due to the procedure of setting up a fax call both G.711 and T.38 is supported by the Ericsson W25. The W25 requires that the call is first setup as a normal voice connection (using G.711) before a switchover from voice to T.38 fax is done with SIP Re-INVITE practices. -
Page 9: Echo Canceller
3.3.2 Echo Canceller To improve the fax transfer the Ericsson W25 also has an echo canceller in accordance with G.168. 3.3.3 The outgoing VoIP related traffic will be prioritized before other traffic from the Ericsson W25 to reduce the uplink delay and jitter. -
Page 10: W25 Configuration
Please also see the document “Ericsson W25 Administrator’s Guide” for more details on Ericsson W25 configuration. Fax service To configure the Fax service in the W25 the CLI is used. It can either be done remotely via SSH or via telnet locally with operator or root user access. -
Page 11: Ims Call Server
• • 4.1.1.1 CLI commands The W25 has already one User Agent configured by default, so this needs to be modified. The commands to modify are: cf set ims.user_agent[0].auth_id <auth_id> cf set ims.user_agent[0].user_id <user_id> cf set ims.user_agent[0].user_password <password> The command to save the new configuration is:... -
Page 12: Ims Media Codec
Note if the proxy[x].address is set to “localhost”, the W25 will not register to any SIP server. To display the entries in the call server, use the following command cf show ims.callserver ims.callserver[0].domain "server.com" The domain parameter is for future use. The proxy[x].port is by default 5060 (according to the SIP standard). - Page 13 Parameter jbig extended_ roundtrip data_wait_time low_rate_ recovery_ packets high_rate_ recovery_ packets To show the current configuration for T.38, use the following command: cf show ims.media.codec.t38 ims.media.codec.t38.forward_error_correction false Depending on radio network characteristics, there might be a need for fine tuning T.38. ECM (Error Correction Mode) may need to be reconfigured since ECM is sensitive for packet loss, it might be necessary to disable this.
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Page 14: Voip Timer
T.38, within a certain time the call is closed by the W25. The time is configurable and default value is 60000 ms (60s). If configured to “0”, the timer will never expire, i.e. the call will not be closed by the FWT. -
Page 15: References
References [1] Internal System Description IMT (IMS Multimedia Telephony) [2] T.30 Procedures for document facsimile transmission in the [3] T.38 Procedures for real-time Group 3 facsimile communication 2/221 02-FGB 101 327 Uen B – November 2007 3.01551-HSC 113 03/4 Uen general switched telephone network over IP networks... -
Page 16: Acronyms And Abbreviations
Acronyms and Abbreviations CDMA Code Division Multiple Access Command Line Interface Domain Name System E.164 International Public Telecommunication Numbering Plan as described in the ITU-T Recommendation E.164. FoIP Fax over IP Fixed Wireless Terminal Global System for Mobile Communication HSDPA High Speed Downlink Packet Access HSPA High Speed Packet Access... -
Page 17: Appendix A
Appendix A This chapter describes the test results for the End-to-End T.38 interoperability tests that has been performed on the T.38 implemented in W25. The list includes all successful fax machines (The list has the following format: Fax machine, Profile and Speed) AT/T PPF200 MMR, ECM, 200x100 V.29 9600... - Page 18 Canon Multi Pass C755 MR, ECM, 200x100 V.17 14400 Canon Multi Pass L6000 MR, ECM, 200x100 V.17 14400 Cardinal MR, ECM, 200x100 V.17 14400 Compaq 9600 PCMCIA MR, ECM, 200x100 V.29 9600 Gammalink Fax Modem MR, ECM, 200x100 V.17 14400 Hayes Optima 14.4 MR, ECM, 200x100 V.17 14400 Hewlett Packard Fax 920 MR, ECM, 200x100 V.17 14400...
- Page 19 Sharp UX 1400 MR, ECM, 200x100 V.17 14400 Sharp UX 3600M MR, ECM, 200x100 V.17 14400 Sharp UX 460 MR, Non-ECM, 200x100 V.29 9600 Supra 28.8 MacIntosh MR, ECM, 200x100 V.17 14400 Telecom AM 11 MR, Non-ECM, 200x100 V.29 9600 Telecom NP 80 MR, Non-ECM, 200x100 V.29 9600 Toshiba TF 231 MR, Non-ECM, 200x100 V.29 9600 Toshiba TF 421 MR, ECM, 200x100 V.29 9600...
- Page 20 © Ericsson AB 2008 – All Rights Reserved This document contains proprietary information, which is protected by copyright. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, or translated into another language, without prior written consent of Ericsson AB, Stockholm, Sweden.
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