Bandwidth Value: 64
Media Attribute (a): ptime:20
Media Attribute Fieldname: ptime
Media Attribute Value: 20
Media Attribute (a): rtpmap:0 PCMU/8000
Media Attribute Fieldname: rtpmap
Media Attribute Value: 0 PCMU/8000
Media Attribute (a): curr:qos local none
Media Attribute Fieldname: curr
Media Attribute Value: qos local none
Media Attribute (a): curr:qos remote none
Media Attribute Fieldname: curr
Media Attribute Value: qos remote none
Media Attribute (a): des:qos mandatory local sendrecv
Media Attribute Fieldname: des
Media Attribute Value: qos mandatory local sendrecv
Media Attribute (a): des:qos mandatory remote sendrecv
Media Attribute Fieldname: des
Media Attribute Value: qos mandatory remote sendrecv
ISDN User Part
Message type: IAM : Initial Address Message (1)
Nature of Connection Indicators: 0x0
Mandatory Parameter: 6 (Nature of connection indicators)
.... ..00 = Satellite Indicator: No Satellite circuit in connection
(0x00)
.... 00.. = Continuity Check Indicator: Continuity check not required
(0x00)
...0 .... = Echo Control Device Indicator: Echo control device not
included
Forward Call Indicators: 0x2000
Mandatory Parameter: 7 (Forward call indicators)
.... ...0 .... .... = National/international call indicator: Call to be
treated as national call
.... .00. .... .... = End-to-end method indicator: No End-to-end method
available (only link-by-link method available) (0x0000)
.... 0... .... .... = Interworking indicator: no interworking
encountered (No.7 signalling all the way)
...0 .... .... .... = End-to-end information indicator: no end-to-end
information available
..1. .... .... .... = ISDN user part indicator: ISDN user part used all
the way
00.. .... .... .... = ISDN user part preference indicator: ISDN user
part prefered all the way (0x0000)
.... .... .... ...0 = ISDN access indicator: originating access non-ISDN
.... .... .... .00. = SCCP method indicator: No indication (0x0000)
Calling Party’s category: 0xa (ordinary calling subscriber)
Mandatory Parameter: 9 (Calling party’s category)
Calling Party’s category: ordinary calling subscriber (0x0a)
User Service Information
coding std. = 0 (CCITT standardized in this recommendation)
info. transfer capability = 0x0 (speech)
transfer mode = 0 (circuit mode)
info. trans. rate (d<->o) = 0x10 (64 kbit/s (for analog circuit))
structure = default (8kHz integrity)
config. = default (point-to-point)
establishment = default (demand)
SIP Message Examples
Call Flow
....................................................................................................................................................................................................................................
235-200-118
Issue 3.02B, March 2007
Lucent Technologies
3-41