Compaq W25 - Manual (Page 2)

Contents
1 INTRODUCTION .......................................................................3
1.1 B ACKGROUND .............................................................................3
2 SYSTEM OVERVIEW ................................................................4
2.1 T HE F AX OVER IP SOLUTION .........................................................4
2.2 V O IP NETWORK ...........................................................................5
2.2.1 SIP Server..................................................................................5
2.2.2 PSTN Gateway ..........................................................................5
2.2.3 Session Border Controller (SBC) ...............................................6
2.3 F AX C ALL S ETUP .........................................................................6
2.4 T.38 AND T30 P ROTOCOL ............................................................7
2.5 A CCESS N ETWORK ......................................................................7
3 ERICSSON W25 ........................................................................8
3.1 S IGNALING ...................................................................................8
3.1.1 Details over the SIP Implementation..........................................8
3.2 S ECURITY ....................................................................................8
3.3 M EDIA S TREAM ............................................................................8
3.3.1 Jitter Buffer.................................................................................8
3.3.2 Echo Canceller...........................................................................9
3.3.3 QoS............................................................................................9
3.4 I NTEROPERABILITY .......................................................................9
4 W25 CONFIGURATION ..........................................................10
4.1 F AX SERVICE .............................................................................10
4.1.1 IMS User Agent........................................................................10
4.1.2 IMS Call Server........................................................................11
4.1.3 IMS Media Codec ....................................................................12
4.1.4 VoIP timer ................................................................................14
5 REFERENCES ........................................................................15
6 ACRONYMS AND ABBREVIATIONS.....................................16
7 APPENDIX A ...........................................................................17
2 2/221 02-FGB 101 327 Uen B – November 2007