| Signalling
sequence 4 (call setup) |
| User A |
| LE A |
| TE |
| LE B |
| User B |
|
|
| Answer message |
|
| (ANM) |
|
| User B answers |
|
|
| Charging |
|
| starts now |
|
| Conversation
over this “pipe” |
|
|
|
|
|
| User B answers,
connection is cut through at LE B. |
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| Charging of the
call starts when ANM message is |
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| received at LE A. |
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| Conversation
can take place over the bi-directional |
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| circuit
switched connection. |
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