Cisco BTS 10200 Softswitch Gebruikershandleiding - Pagina 9

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Cisco BTS 10200 Softswitch T.38 Fax Relay

Call Flow

The following call flow diagram

Softswitch software modules for the CA-controlled T.38 Fax Relay implementation.

Figure 1

CRCX(PCMU, t38)

RQNT (fxr / t38())

NTFY (fxr / t38(start))

MDCX (inactive)

MDCX (L: a:image/t38, SendRecv

ACK/NACK

NTFY (fxr / t38(stop))

(Figure

CA-Controlled T.38 Fax Relay

MGA

BCM

CNM API

EstablishCx_ex (PCMU, T38 )

RTP Cut thru (H323 fast start)

SAI CCM OOBINFO REQ

Service feature Ind(fax-start)

CNM API

RemoteModifyCL_ex (in active)

CNM API

RemoteModifyCL_ex (send recv, t.38

SDP)

CNM API

prepareResponse (ACK/NACK)

Fax transmission starts

Service feature Ind(fax-stop)

Normal Call release

1) illustrates the interactions between the Cisco BTS 10200

H3A

Service feature Req(fax-start)

Service feature Req(fax-stop)

Cisco BTS 10200 Softswitch T.38 Fax Relay Support

External Interfaces

H245 Request mode(t38)

Fax information exchange