As relayed from Obihai support in the topic I linked to above:
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Number = {speed-dial-number};send={digits}
{digits} = one or more of the following codes (case-sensitive):
0-9,*,#,a,b,c,d = send corresponding dtmf (100 ms on+off)
S = Delay for 3s
s = Delay for 1s
A = Wait for Answer (or otherwise start sending on early media, if available,
or when call is answered, whichever first)
U = Prompt user on phone screen to dial any number of digits manually, then
click "OK" to continue sending remaining DTMF's
"prompt" = (Only allowed right after a U) An optional prompt to
show on screen to prompt user to enter digits; default is
"Press OK to continue".
Here is an example:
{digits} = ASSss1234U"Enter Password"s4567U"sSEnter a code"123#
Means:
Wait for callee to answer, wait 8s, send 1234,
then prompt user to "Enter Password"
When user click OK, wait 1s, then send 4567.
Prompt user to "Enter a code", then send 123#
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After the ;
the A means wait for called number to answer
Each S adds a wait of 3 seconds
Each s adds a wait of 1 second.
Then the rest which, in your case of no prompt, is the code digits and their ending #.