Owner manual

UG_1x22_043 V.22 bis Linux Softmodem for 73M1x22 MicroDAA User Guide

Rev. 1.5 49

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Bit 4 0

Select 1800 Hz guard tone to be generated during answer mode

handshake

Select 550 Hz guard tone to be generated during answer mode

handshake

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Bit 5 0 Disables guard tone generation

1 Enables guard tone generation

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Bit 6 0 Disable V.23 turnaround

1 Enable V.23 turnaround

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Bit 7 0 Tx 1200 bps (Bell 202 and V.23 slave mode)

1 Rx 1200 bps (Bell 202 and V.23 master mode)

S27 Call Progress Transmit Register

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0 See following.

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Bit 0 0 Send “0FFh” characters in pseudo sync (Y4)

1 Do not send “0FFh” characters in pseudo sync (Y4)

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Bit 1 0 Do not transmit 1100Hz

1 Transmit 1100Hz

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Bit 2 0 Do not transmit 1300Hz

1 Transmit 1300Hz

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Bit 3 0 Do not transmit 2100Hz

1 Transmit 2100Hz

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Bit 4 0 Do not transmit 2225Hz

1 Transmit 2225Hz

Bit 5 Disconnect bit

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Bit 6 0 CCITT V22bis, V22, V21, V23 (B0 command)

1 Bell 103, Bell 202, Bell 212A (B1 command)

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Bit 7 0 Protocol selection not done

1 Protocol selection done

Order of precedence is as follows from highest to lowest: Bit 1, Bit 2, Bit3, Bit 4