C-60
SIP IP Phone to SIP IP Phone: Call Return
Figure C-24. SIP IP Phone to SIP IP Phone: Call Return — Diagram 4
SIP Phone UA Marshal Redirect Server
Feature Server:
Call Return
SIP Phone
48. 180
49. 180
50. 200
51. 200
52. ACK
53. ACK
54. BYE
55. BYE
56. 200
57. 200