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智能网技术体制(暂行规定)(3)

  
  6.2.2 300呼叫
  300呼叫流程除应答信号外同6.2.1。下面补充连续呼叫的信号流程(以SSP设在长途局为例,见图41)。
  6.2.3 虚拟专用网呼叫
  虚拟专用网呼叫的信号流程同6.2.1,下面仅补充无应答转移的信号流程(见图42)。


PABX     LS         SSP       SCP       TS        LS       PABX
|6       |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|0       |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|0       |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|N1      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|N2      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A6      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|KA      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|P′      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|∶       |          |         |         |         |        |
|D′      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|15      |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|(N)     |          |         |         |         |        |
|-------→|          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|∶       |          |         |         |         |        |
|A1      |          |         |         |         |        |
|←-------|等4-6S     |         |         |         |        |
|        |(A)       |         |         |         |        |
|        |---------→|IDP      |         |         |        |
|        |          |--------→|         |         |        |
|        |          |IRB.CON  |         |         |        |
|        |          |←--------|         |         |        |
|        |          |         |IAM      |IAM      |        |
|        |          |---------|--------→|--------→|P       |
|        |          |         |         |         |-------→|
|        |          |         |         |         |A1      |
|        |          |         |         |         |←-------|
|        |          |         |         |         |¨       |
|        |          |         |         |         |D       |
|        |          |         |         |         |-------→|
|A3      |ACM       |         |ACM      |ACM      |A3      |
|←-------|←---------|←--------|---------|←--------|←-------|
|KD      |          |         |         |         |        |
|←-------|          |         |         |         |        |
|KB      |          |ACR ERB  |         |         |        |
|←-------|          |--------→|         |         |        |
|        |给用户录音通知请稍候|CTR P&C  |         |         |        |
|        |          |←--------|         |         |        |
|        |          |CDM      |         |         |        |
|        |          |←--------|         |         |        |
|        |          |         |IAM      |IAM      |        |
|        |          |---------|--------→|--------→|P       |
|        |          |         |         |         |-------→|
|        |          |         |         |         |A1      |
|        |          |         |         |         |←-------|
|        |          |         |         |         |D       |
|        |          |         |         |         |-------→|
|        |          |         |         |         |A3      |
|        |          |         |         |         |←-------|
|        |          |         |ACM      |ACM      |KD      |
|        |          |←--------|---------|←--------|-------→|
|        |          |         |         |         |KB      |
|        |          |         |         |         |←-------|
|应答      |CON       |         |ANN      |ANN      |应答      |
|←-------|←---------|←--------|---------|←--------|←-------|
|拆线      |CLF       |CLF      |CLF      |         |拆线      |
|-------→|---------→|--------→|---------|--------→|-------→|
|        |          |ACR      |         |         |        |
|        |          |--------→|         |         |        |
|释放监护    |RLG       |RLG      |         |RLG      |释放监护    |
|←-------|←---------|←--------|←--------|---------|←-------|
|        |          |         |         |         |        |
|        |          |         |         |         |        |
      图42 虚拟专用网呼叫(有一次无应答呼叫前转)


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