Call Control - Default Call Flows

This section includes default call flows for various call scenarios. You can modify these call flows to suit your application needs, using the PPL programmability of Call Control.

Simple Call Cut-Through

Trunk Type: E&M Wink Start

Inseize Instructions:

1. Report Incoming Call

2. Wait for Host Control

Sequence:

1. When the Excel platform detects an incoming call, the Excel platform reports the call along with the channel ID to the host in the form of a Request for Service message.

2. The host sends a Connect message to outseize the destination channel.

3. When the outseizure ACK (Wink) is detected, the inseize ACK (Wink) is generated.

4. The connection between the two channels is now established. The terminating equipment can now collect and analyze digits.

5. When answer signaling is detected, the Excel platform answers the incoming call.

Park with Reconnection to an Incoming Call

This call flow shows a parked connection with a re-connection to an incoming call.

1. Channel 1 is connected to Channel 2.

2. The host issues a Park Channel message to park Channel 1.

3. The Excel platform parks Channel 1 and releases Channel 2.

4. The Excel platform processes an incoming call without host intervention.

5. This call is reported to the host along with all impulsed address digits.

6. The host sends a Connect message to connect Channels 1 and 3.

7. The Excel platform answers the incoming call if the parked call was previously answered, assuming that the Excel platform is controlling answer supervision.

8. Channel 1 is now connected to Channel 3.

Connecting a Connected Channel to an Outseized Channel

The following call flow shows a connection from a connected channel to an outseized channel.

1. Channel 1 and Channel 2 are connected.

2. The host initiates an outseizure with digit outpulsing.

3. Upon completion, the Excel platform returns an acknowledgment.

4. The host sends a Connect message to connect Channels 1 and 3.

5. Upon completion, the Excel platform sends an acknowledgment and releases Channel 2.

Broadcast with One-Way Connection

1. The Excel platform processes an incoming call over Channel 1.

2. The host initiates an outseizure over Channel 2.

3. Upon completion, the Excel platform returns an acknowledgment.

4. The host issues a Connect One-Way Forced message to the Excel platform, using Channel 2 as the one-way source.

5. The Excel platform makes the connection and returns an acknowledgment.

6. The Excel platform processes another incoming call over Channel 3 and reports it to the host.

7. The host again issues a Connect One-Way Forced message to the Excel platform, using Channel 2 as the one-way source.

8. The Excel platform makes the 1-way connection and returns an acknowledgment.

9. The Excel platform processes another incoming call over Channel 3 and reports it to the host.

10. The host issues another Connect One-Way Forced message to the Excel platform using Channel 2 as the one-way source.

11. The Excel platform makes the one-way connection and returns an acknowledgment.