SERIES II INTELLIGENT DATA/FAX MODEMS

Fax Carrier

V.21CH2 (Half Duplex)

Frequencies

1650Hz Mark, 1850Hz Space for Transmit

 

Originate

 

 

1650Hz Mark, 1850Hz Space for Transmit

 

Answer

 

 

V.27ter 1800Hz Originate/Answer

 

V.29 QAM 1700Hz Originate/Answer

 

V.17 TCM 1800Hz Originate/Answer

Lease Line Restoral

336+ (MD1640A) only: When in dial backup

 

mode, modem attempts leased line restoral

 

periodically (controlled by S-Register S18

 

setting)

 

Carrier Frequencies

1800 Hz V.32/V.32bis/V.34/Enhanced V.34:

 

33.6K/31.2K/28.8K/26.4K/24K/21.6K/

 

19.2K/16.8K/14.4K/12K/9.6K/7.2K/4.8K

Carrier Frequencies

Transmit Originate:

1200 Hz

2400 & 1200 bps

Transmit Answer:

2400 Hz

(V.22bis/V.22 or

Receive Originate:

2400 Hz

Bell 212A Standard)

Receive Answer:

1200 Hz

Carrier Frequencies,

1270 Hz Mark, 1070 Hz Space for

300 bps (Bell Standard)

Transmit Originate

 

 

2225 Hz Mark, 2025 Hz Space for Receive

 

Originate

 

 

2225 Hz Mark, 2025 Hz Space for Transmit

 

Answer

 

 

1270 Hz Mark, 1070 Hz Space for Receive

 

Answer

 

Transmit Level

-11dBm (dial-up), -9 or -15 dBm (leased-

 

line); dBm level selectable with DIP-

 

Switch #3 in leased line setting

Frequency Stability

±0.01%

 

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Black Box MD1641A, MD1640A manual Fax Carrier, Lease Line Restoral, Carrier Frequencies, 2400 & 1200 bps, 22bis/V.22 or