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SIP interface configuration task list
379
SmartWare Software Configuration Guide
32 • SIP interface configuration
Figure 56
shows an example scenario where a SIP network connects two devices to give a home office access to
a PBX in the central office.
Figure 56. Example SIP network connecting two device to give a home office access to the CO PBX
The phone in the home office has two active calls to other subscribers of the PBX in the central office. The user
wants to connect the other two participants and
(a)
sends an explicit call-transfer invocation to the device HO.
The device HO internally connects the two calls and sends a DISCONNECT message to the phone for both
calls. In a second step
(b)
the firmware on HO detects an internal loop. Both call legs are connected to the
same network. In this example, both call legs are handled by the same SIP gateway. The firmware on device
HO sends a REFER message to device CO, which connects the two call legs internally and sends a BYE mes-
sage to the device HO.
(c)
Again the firmware of CO detect an internal loop. This time the call legs are han-
dled by the same SIP interface, connected to the PBX. Since the ISDN port is a user port it sends an explicit
call-transfer invocation to the PBX
(d)
, which connects the call and sends the device CO a DISCONNECT
message for both calls. During all these push back operations the datapath of the two participants
keeps connected.
Central Office
Console
Vo
IP
Media Gateway
ToIP
Access
Device
SmartNode 41
18
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Home Office
(a)
ECT
Console
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SIP
(b)
REFER
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SIP
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ECT
Console
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SIP
(d)
DISCONNECT
BYE
DISCONNECT
Console
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Gateway Router
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Enet 0
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Access Device
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Link
100M
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Enet 0
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ort
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Power
Run
V
oIP
Link
Link
100M
Activity
Enet 1
Содержание SmartWare R.3.20
Страница 553: ...553 Appendix A Terms and definitions Chapter contents Introduction 554 SmartWare architecture terms and definitions 554...
Страница 559: ...559 Appendix B Mode summary Chapter contents Introduction 560...
Страница 566: ...566 Appendix D Internetworking terms acronyms Chapter contents Abbreviations 568...
Страница 571: ...571 Appendix E Used IP ports available voice codecs Chapter contents Used IP ports 573 Available voice codecs 574...