Cisco SPA8800 Configuring

Configuring the Cisco SPA8800 IP Telephony Gateway in an Asterisk Environment
© 2009 Cisco Systems, Inc. All rights reserved. Page 68 of 69
Trace of FAX Line Toggle Code #99
Following are two trace segments of a SIP INVITE showing the difference in the INVITE when #99
is dialed.
This trace shows the SDP information from a call made where 85551212 was dialed where 8 is a
steering digit. Notice that the media type is audio and that audio codecs are listed in the media
formats.
…
Session Initiation Protocol
Request-Line: INVITE sip:85551212@192.168.2.236 SIP/2.0
Message Header
Message Body
Session Description Protocol
Session Description Protocol Version (v): 0
Owner/Creator, Session Id (o): - 225352 225352 IN IP4 192.168.2.237
Session Name (s): -
Connection Information (c): IN IP4 192.168.2.237
Time Description, active time (t): 0 0
Media Description, name and address (m): audio 16418 RTP/AVP 0 2 4 8 18 96 97 98
100 101
Media Type: audio
Media Port: 16418
Media Proto: RTP/AVP
Media Format: ITU-T G.711 PCMU
Media Format: ITU-T G.721
Media Format: ITU-T G.723
Media Format: ITU-T G.711 PCMA
Media Format: ITU-T G.729
Media Format: 96
Media Format: 97
Media Format: 98
Media Format: 100
Media Format: 101
Media Attribute (a): rtpmap:0 PCMU/8000
Media Attribute Fieldname: rtpmap
Media Format: 0
MIME Type: PCMU
…
This second trace shows the SDP information from a call made where #9985551212 was dialed
where 8 is a steering digit. Notice that the media type is image and the media format is t38 etc.
…
Session Initiation Protocol
Request-Line: INVITE sip:85551212@192.168.2.236 SIP/2.0
Message Header
Message Body
Session Description Protocol
Session Description Protocol Version (v): 0
Owner/Creator, Session Id (o): - 230398 230398 IN IP4 192.168.2.237
Session Name (s): -
Connection Information (c): IN IP4 192.168.2.237
Time Description, active time (t): 0 0
Media Description, name and address (m): image 16422 udptl t38
Media Type: image
Media Port: 16422
Media Proto: udptl
Media Format: t38
Media Attribute (a): T38FaxVersion:0
Media Attribute Fieldname: T38FaxVersion
Media Attribute Value: 0
Media Attribute (a): T38MaxBitRate:14400
Media Attribute Fieldname: T38MaxBitRate
Media Attribute Value: 14400
Media Attribute (a): T38FaxRateManagement:transferredTCF
Media Attribute Fieldname: T38FaxRateManagement
Media Attribute Value: transferredTCF
Media Attribute (a): T38FaxMaxBuffer:200
Media Attribute Fieldname: T38FaxMaxBuffer
Media Attribute Value: 200
Media Attribute (a): T38FaxMaxDatagram:200
Media Attribute Fieldname: T38FaxMaxDatagram
Media Attribute Value: 200
Media Attribute (a): T38FaxUdpEC:t38UDPRedundancy
Media Attribute Fieldname: T38FaxUdpEC
Media Attribute Value: t38UDPRedundancy
…

Cisco SPA8800 Specifications

General

Brand	Cisco
Model	SPA8800
Category	Gateway
Language	English