Sample Call Flow
This is a very basic call flow involving only two telecom switches which exchange the ISUP messages. The subscriber interfaces are not covered here and are only listed for a better understanding.
A subscriber telco switch A telco switch B B subscriber Off hook Dial digits ---> -- IAM --> -Ringing -> <-- ACM -- Off hook <-- ANM -- ----------------------- Conversation ----------------------- On hook -- REL --> On hook <-- RLC --Detailed call flows are provided in ITU-T Recommendation Q.784.1.
Read more about this topic: ISDN User Part
Famous quotes containing the words sample, call and/or flow:
“As a rule they will refuse even to sample a foreign dish, they regard such things as garlic and olive oil with disgust, life is unliveable to them unless they have tea and puddings.”
—George Orwell (1903–1950)
“What we call generosity is for the most part only the vanity of giving; and we exercise it because we are more fond of that vanity than of the thing we give.”
—François, Duc De La Rochefoucauld (1613–1680)
“By the flow of the inland river,
Whence the fleets of iron have fled,
Where the blades of the grave-grass quiver,
Asleep are the ranks of the dead:—”
—Francis Miles Finch (1827–1907)