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Ericsson W25 Fixed Wireless Terminal for WCDMA/HSPA Mobile Networks Application Note: Fax over IP with Ericsson W25.
Contents 1 INTRODUCTION ....................................................................... 3 1.1 B ACKGROUND ............................................................................. 3 2 SYSTEM OVERVIEW .......................................
1 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. 1.1 Background The Ericsson W25 is intended for residential an d SOHO applications.
2 System Overview Fax over IP is based on Voice over IP. The Voice over IP system utilizes IP technology over broadband networks and uses SIP for control signaling and RTP for media. The differences between Fax and Voice are the codecs. For voice the normal voice codecs are G.
2/221 02-FGB 101 327 Uen B – November 2007 5 2.2 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.
2.2.2.2 Media Gateway (MGW) The Media Gateway (MGW) provides interworking between PSTN and IP media streams, i.e. conversion between circuit-switched TD M (Time Division Multiplexing) bearer circuits and packet-switched media streams (RTP).
2.4 T.38 and T30 Protocol There are two protocols used to transfer a fax over IP; T.30 [2] and T.38 [3]. T.30 is the protocol that describes th e communication process between two fax machines on a circuit-switched network. T.38 is the protocol that describes th e process for sending and receiving fax in real-time over a packet network.
3 Ericsson W25 The Ericsson W25 will work as a gateway, using T.38 protocol. The fax terminal shall be connected to the dedicated fax port on the Ericsson W25. Associated to this fax port is a SIP User Agent, which manages and controls the media streams by using the SIP protocol (RFC 3261) towards the SIP server and the PSTN Gateway.
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 QoS The outgoing VoIP related traffic will be prioritized before other traffic from the Ericsson W25 to reduce the uplink delay and jitter.
4 W25 Configuration For configuration purpose, the Ericsson W25 includes a CLI (Command Line Interface) and a WUI (web user interface) which are accessible as illustrated in the figure below. Please also see the document “Ericsson W25 Administrator’s Guide” for more details on Ericsson W25 configuration.
• user id , which is the public user identification e.g. the phone number xxxxx • password, which is the password for the user id 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.
Note if the proxy[x].address is set to “localhost”, t he W25 will not register to any SIP server. To display the entries in the call ser ver, use the following command cf show ims.callserver ims.callserver[0].domain "server.com" .proxy[0].
2/221 02-FGB 101 327 Uen B – November 2007 13 Parameter Description jbig JBIG should be used, (reduces bandwidth). (True|False) Ecm Specifies if ECM should be used or not.
It’s recommended to not enable “extended_roundtrip”, since it has been shown that this cause interoperability problems. Not all gateways support recovery packets, but then the recovery packets will be ignored. Note that at the same time as the recovery_packets is increase, the bandwidth requirement increase as well.
5 References [1] Internal System Description IMT (IMS Multimedia Telephony) 3.01551-HSC 113 03/4 Uen [2] T.30 Procedures for document facsimile transmission in the general switched telephone network [3] T.
6 Acronyms and Abbreviations CDMA Code Division Multiple Access CLI Command Line Interface DNS Domain Name System E.164 International Public Telecommunication Numbering Plan as described in the ITU-T Recommendation E.
7 Appendix A This chapter describes the test results for the End-to-End T.38 interopera bility 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, 200x1 00 V.
Okidata OkiOffice 84 MH, ECM, 200x100 V.17 144 00 Olivetti OFX-1000 MH, ECM, 200x100 V.29 9600 Olivetti OFX 3100 MH, ECM, 200x100 V.29 9600 Panasonic KX F1600 MH, Non-ECM, 200x100 V.29 9600 Panasonic KX F3000 MH, Non-ECM, 200x100 V.29 9600 Panasonic KX F500 MH, Non-ECM, 200x100 V.
Sharp UX 1400 MR, ECM, 200x100 V.17 14400 Sharp UX 3600M MR, ECM, 200x100 V.17 14400 Sharp UX 460 MR, Non-ECM, 20 0x100 V.29 9600 Supra 28.8 MacIntosh MR, ECM, 200x100 V.17 14400 Telecom AM 11 MR, Non-ECM, 200x100 V.29 960 0 Telecom NP 80 MR, Non-ECM, 200x100 V.
© 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.
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