Intel MD566X - Manual (Page 32)

56K V.92 Data, Fax, and Voice Chipset
32 Intel Confidential Programmer’s Guide
Modem-on-Hold: Initiating a Voice Call in Data Mode
Enable MOH
(+PMH=0)
Command Mode
(+++AT)
Request to go on hold
(+PMHR)
Server
Accepts
Request?
Flash Hook
(+PMHF)
Flash Hook
(+PMHF)
Initiate Call
Finish Call
No (Returns 0)
Yes
(Returns 1-13)
End Data Connection
(ATH)
Yes
No
Disconnect?
Go Back Online
(ATO)