Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide (SCCP) (2.15.ms, Rev B0)
SCCP Call Flows
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SCCP Call Flows

Table Of Contents

SCCP Call Flows

Supported SCCP Message Set

Call Flow Scenarios for Successful Calls

Cisco ATA-to-Cisco CallManager

Cisco ATA-to-Cisco CallManager-to-Cisco ATA


SCCP Call Flows


This section describes basic call flows for the Cisco ATA:

Supported SCCP Message Set

Call Flow Scenarios for Successful Calls


Note The term Cisco ATA is used throughout this manual to refer to both the Cisco ATA 186 and the Cisco ATA 188, unless differences between the Cisco ATA 186 and Cisco ATA 188 are explicitly stated.


Supported SCCP Message Set

The SCCP message set includes three sections:

Registration and management messages

StationRegister

StationReset

StationMediaPort

StationSpeedDialState

StationRegisterAck

StationRegister

StationIpPort

StationMediaPortList

StationForwardStatReq

StationSpeedDialStatReq

StationLineStatReq

StationConfigStatReq

StationTimeDateReq

StationButtonTemplateReq

StationVersionReq

StationCapabilitiesRes

StationServerReq

StationAlarm

Call Control Messages

StationKeyPadButton

StationEnblocCall

StationStimulus

StationOffHook

StationOffHookwithCallingPartyNumber

StationOnHook

StationHookFlash

StationStartTone

StationStopTone

StationSetRinger

StationSetLamp

StationSetHkFDetect

StationSetSpeakerMode

StationSetMicroMode

StationCallInfo

StationDisplayText

StationClearDisplay

StationEnunciatorCommand

Media Control Messages

StationStartMediaTransmission

StationStopMediaTransmission

StationStartSessionTransmission

StationStopSessionTransmission

StationMulticastMediaReception

StationMulticastMediaReceptionAck

StationStopMulticastMediaReception

StationStartMulticastTransmission

StationStopMulticastTransmission

StationOpenReceiveChannel

StationOpenReceiveChannelAck

StationCloseReceiveChannel

Call Flow Scenarios for Successful Calls

This section describes call flows for the following scenarios:

Cisco ATA-to-Cisco CallManager

Cisco ATA-to-Cisco CallManager-to-Cisco ATA

Each of the call flows includes a call diagram, an action descriptions table, and a sample log file.

Cisco ATA-to-Cisco CallManager

Figure D-1 Illustrates the Cisco ATA registering with Cisco CallManager:

Figure D-1 Cisco ATA-to-Cisco CallManager

Table D-1 Action Descriptions for First Call Flow

Step
Action
Description

Step 1 

StationRegister—Cisco ATA to Cisco CallManager

Cisco ATA sends a message to announce its existence to the Cisco CallManager.

Step 2 

StationReset—Cisco CallManager to Cisco ATA

The Cisco CallManager commands the Cisco ATA to reset its processes.

Step 3 

StationIpPort—Cisco ATA to Cisco CallManager

The Cisco ATA provides Cisco CallManager with the UDP port for the RTP stream.

Step 4 

StationRegisterAck—Cisco CallManager to Cisco ATA

Cisco CallManager acknowledges the registration of the Cisco ATA.

Step 5 

StationCapabilitiesReq—Cisco CallManager to Cisco ATA

Cisco CallManager requests the current capabilities of the Cisco ATA.

Step 6 

StationVersionReq—Cisco ATA to Cisco CallManager

Cisco ATA requests the version number of the software.

Step 7 

StationCapabilitiesRes—Cisco ATA to Cisco CallManager

Cisco ATA responds to the Station Capabilities Request message from the Cisco CallManager. These capabilities are cached in the Cisco CallManager and are used to negotiate terminal capabilities with an H.323-compliant terminal.

Step 8 

StationVersionRes—Cisco CallManager to Cisco ATA

Cisco CallManager informs the Cisco ATA of the current software version number.

Step 9 

StationButtonTemplateReq—Cisco ATA to Cisco CallManager

Cisco ATA requests the button template definition for that specific Cisco ATA.

Step 10 

StationButtonTemplateRes—Cisco CallManager to Cisco ATA

Cisco CallManager updates the button template information contained in the Cisco CallManager.

Step 11 

StationTimeDateReq—Cisco ATA to Cisco CallManager

Cisco ATA requests the current date and time for internal usage and for displaying a text string.

Step 12 

StationDefineTimeDate—Cisco CallManager to Cisco ATA

Cisco CallManager provides the date and time information to the Cisco ATA.

Cisco ATA-to-Cisco CallManager-to-Cisco ATA

Figure D-2 illustrates the call flow between Cisco ATA 1 and Cisco ATA 2 through a Cisco CallManager. The call flow is as follows:

Figure D-2 Cisco ATA-to-Cisco CallManager-to-Cisco ATA

Table D-2

Step
Station Call Info
Description

Step 1 

Station OffHook—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 informs the Cisco CallManager that Cisco ATA 1 is not in an OffHook condition, and simultaneously provides calling party number information to the Cisco CallManager.

Step 2 

Station Set Lamp (Steady)—Cisco CallManager to Cisco ATA 1

When the Cisco ATA detects that one port is in an off-hook state, the Cisco ATA turns on the lamp, then turns off the lamp once both ports are in the on-hook state.

Step 3 

Station Start Tone (Inside Dial Tone)—Cisco CallManager to Cisco ATA 1

Cisco CallManager commands Cisco ATA 1 to play a specified tone. If the Cisco ATA is currently playing a tone, the indicated tone takes precedence. If the definition is continuous, the Cisco ATA plays it until receiving a StationStopTone message. If the tone definition contains a duration value, the Cisco ATA stops playing the tone at the expiration of the duration. See also Bellcore SR-TSV-002275.

Step 4 

Station Keypad Button—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 informs the Cisco CallManager when a keypad digit is pressed.

Step 5 

Station Stop Tone—Cisco CallManager to Cisco ATA 1

Cisco CallManager commands Cisco ATA1 to stop playing the current tone.

Step 6 

Station Keypad Button—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 informs the Cisco CallManager when a keypad digit is pressed.

Step 7 

Station Keypad Button—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 informs the Cisco CallManager when a keypad digit is pressed.

Step 8 

Station Keypad Button—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 informs the Cisco CallManager when a keypad digit is pressed.

Step 9 

Station Call Info—Cisco CallManager to Cisco ATA 2

Cisco CallManager informs Cisco ATA 2 of called and calling party identification information.

Step 10 

Station Set Lamp (Blink)—Cisco CallManager to Cisco ATA 2

When the Cisco ATA detects that one port is in an off-hook state, the Cisco ATA turns on its Function button, then turns off the Function button once both ports are in the on-hook state.

Step 11 

Station Set Ringer (Inside Ring)—Cisco CallManager to Cisco ATA 2

Cisco CallManager commands Cisco ATA 2 to set an audible inside ringing mode. Ring modes are derived from Bellcore SR-TSV-002275.

Step 12 

Station Call Info—Cisco CallManager to Cisco ATA 1

Cisco CallManager informs Cisco ATA 1 of called and calling party identification information.

Step 13 

Station Start Tone (alerting)—Cisco CallManager to Cisco ATA 1

Cisco CallManager commands Cisco ATA 1 to play an alert tone. If Cisco ATA 1 is currently playing a tone, the indicated tone takes precedence. If the definition is continuous, the Cisco ATA plays it until receiving a StationStopTone message. If the tone definition contains a duration value, the Cisco ATA stops playing the tone at the expiration of the duration. See also Bellcore SR-TSV-002275.

Step 14 

Station OffHook—Cisco ATA 2 to Cisco CallManager

Cisco ATA 2 informs the Cisco CallManager that Cisco ATA 2 is not in an Off Hook condition, and simultaneously provides calling party number information to the Cisco CallManager.

Step 15 

Station Set Ringer (Off)—Cisco CallManager to Cisco ATA 2

Cisco CallManager commands Cisco ATA 2 to set a specified audible ringing mode. Ring modes are derived from Bellcore SR-TSV-002275.

Step 16 

Station Stop Tone—Cisco CallManager to Cisco ATA 1

Cisco CallManager commands Cisco ATA 1 to stop playing the current tone.

Step 17 

Station Set Lamp (Steady)—Cisco CallManager to Cisco ATA 2

When the Cisco ATA detects that one port is in an off-hook state, the Cisco ATA turns on its function button, then turns off the Function button once both ports are in the on-hook state.

Step 18 

Station Open Receive Channel—Cisco CallManager to Cisco ATA 1

Cisco CallManager allows Cisco ATA 1 to begin receiving a unicast RTP stream.

Step 19 

Station Open Receive Channel—Cisco CallManager to Cisco ATA 2

Cisco CallManager allows Cisco ATA 2 to begin receiving a unicast RTP stream.

Step 20 

Station Call Info—Cisco CallManager to Cisco ATA 1

Cisco CallManager informs Cisco ATA 1 of called and calling party identification information.

Step 21 

Station Open Receive Channel Ack—Cisco ATA 1 to Cisco CallManager

Cisco ATA 1 provides the following information to the Cisco CallManager:

Status of the open action

Receive-port address and number for transmission to the remote end.

Step 22 

Station Start Media Transmission—Cisco CallManager to Cisco ATA 2

Cisco CallManager commands Cisco ATA 2 to become the source for the multicast address.

Step 23 

Station Open Receive Channel Ack—Cisco ATA 2 to Cisco CallManager

Cisco ATA 2 provides the following information to the Cisco CallManager:

Status of the open action

Receive-port address and number for transmission to the remote end.

Step 24 

Station Start Media Transmission—Cisco CallManager to Cisco ATA 1

Cisco CallManager commands Cisco ATA 1 to become the source for the multicast address.

Step 25 

Station On Hook—Cisco ATA 2 to Cisco CallManager

Cisco ATA 2 informs the Cisco CallManager that the Cisco ATA is now in an On Hook condition.

Step 26 

Station Close Receive channel—Cisco CallManager to Cisco ATA 1

Cisco CallManager terminates the reception of an RDT stream between Cisco ATA 1 and Cisco ATA 2.

Step 27 

Station Set Lamp (Off)—Cisco CallManager to Cisco ATA 2

When the Cisco ATA detects that one port is in an off-hook state, the Cisco ATA turns on its Function button, then turns off the Function button once both ports are in the on-hook state.

Step 28 

Station Stop Media transmission—Cisco CallManager to Cisco ATA 1—Cisco CallManager to Cisco ATA 2

Cisco CallManager stops Cisco ATA 1 from being the source of the RTP stream in a multicast conference.

Step 29 

Station Close Receive Channel—Cisco CallManager to Cisco ATA 2

Cisco CallManager terminates the reception of an RDT stream between Cisco ATA 1 and Cisco ATA 2.

Step 30 

Station Set Lamp (Off)—Cisco CallManager to Cisco ATA 1

When the Cisco ATA detects that one port is in an off-hook state, the Cisco ATA turns on its Function button, then turns off the Function button once both ports are in the on-hook state.

Step 31 

Station Stop Media Transmission—Cisco CallManager to Cisco ATA 2

Cisco CallManager terminates the reception of an RDT stream between Cisco ATA 1 and Cisco ATA 2.

Step 32 

Station On Hook—Cisco ATA 1 to Cisco CallManager

Cisco ATA informs the Cisco CallManager that Cisco ATA 1 is now in an On Hook condition.

Action Descriptions for Second Call Flow