Appendix
955
Step
Action
Description
F21
ACK— User A to Proxy Server
User A sends a SIP ACK to the proxy server.
The ACK confirms that User A has received
the 200 OK response. The call session is
now active.
F22
ACK—Proxy Server to User C
The proxy server sends the ACK message to
User C. The ACK confirms that the proxy
server has received the 200 OK response.
Summary of Contents for SIP-T19 E2 T4 Series
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Page 532: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series T5 Series IP Phones 510 ...
Page 734: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series T5 Series IP Phones 712 ...
Page 814: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series T5 Series IP Phones 792 ...
Page 850: ...Administrator s Guide for SIP T2 Series T19 P E2 T4 Series T5 Series IP Phones 828 ...
Page 887: ...Troubleshooting 865 The phone begins rebooting Any reboot of the phone may take a few minutes ...