用户 LS SSP SCP TS LS PABX
| |6 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |0 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |0 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |N | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |N1 | | | | |
| |-------→| | | | |
| |A6 | | | | |
| |←-------| | | | |
| |KA | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |P | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |Q | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |∶ | | | | |
| |15 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |N2 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |∶ | | | | |
| |G4 | | | | |
| |-------→| | | | |
| |A1 | | | | |
| |←-------| | | | |
| |A3 | | | | |
| |←-------| | | | |
| |KD | | | | |
| |-------→| | | | |
| |KB | | | | |
| |←-------| | | | |
| | |IDP | | | |
| | |------------------→| | | |
| | |CTR | | | |
| |应答 |←------------------| | | |
| |←-------|P&C | | | |
| | |←------------------| | | |
|--------|----------------| | | | |
|用户和 |SSP交互作用 | | | | |
|--------|----------------| | | | |
| | |CON | | | |
| | |←------------------| | | |
| | | |P | | |
| | |----------|---------→| | |
| | | |A1 |P | |
| | |←---------|----------|----------→| |
| | | |∶ |A1 | |
| | | | |←----------| |
| | | | |R | |
| | | | |----------→| |
| | | | |A1 | |
| | | | |←----------| |
| | | | |A | |
| | | | |-----------|--------→|
| | | |D |A1 | |
| | |----------|---------→|←----------|---------|
| | | |A1 |D | |
| | |←---------|----------|-----------|--------→|
| | | |A3 |A3 | |
| | |←---------|----------|←----------|---------|
| | | |KD |KD | |
| | |----------|---------→|-----------|--------→|
| | | |KB |KB | |
| | |←---------|----------|←----------|---------|
| | |应答 |应答 | |应答 |
| | |←---------|←---------|-----------|←--------|
| | | | | | |
|--------|----------------|--------------------|--------------------|----------------------|------------------|
| | | 通话 | | | |
|--------|----------------|--------------------|--------------------|----------------------|------------------|
|拆线 |拆线 |拆线 | |拆线 |拆线 |
|---→|-------→|----------|---------→|----------→|--------→|
| | |ACR | | | |
| | |------------------→| | | |
|释放监护|释放监护 |释放监护 | 释放|监护 |释放监护 |
|←---|←-------|←---------|←---------|-----------|←--------|
| | | | | | |
图35 虚拟专用网的远端接入