Additional Synchronous Information; Parity And Character Length On The Mca - Nortel Meridian M3905 User Manual

CALL CONNECTED.SESSION STARTS

Additional synchronous information

Use fifi and fi‡ (HDLC On) for Group IV FAX. Use fifi and fifl (Bisync On)
for video.
When V.25 fifi) is turned on, the MCA automatically switches to synchronous
mode. When in the V.25 mode, auto answer is not available.
If an MCA in synchronous mode calls another data module in asynchronous
mode, the call is connected. You must drop the call.

Parity and character length on the MCA

In Asynchronous mode the MCA is designed to work with 8 bit data characters.
You can use various parity settings, but the total character length must equal 8
bits. The MCA accepts the following character lengths and parity settings:
The MCA controls parity only when it displays prompts before the data call is
established. In this case, the MCA outputs the prompts to the DTE with the parity
settings defined with P23–P26, or it determines parity automatically with
c c
the < > < >. sequence.
Once the data call is established, the MCA does not check or regenerate parity.
The MCA will transport the 8 bit character to the far end with the parity
unchanged.
Additional asynchronous features
8 data bits, no parity bit
7 data bits + one bit of Even parity
7 data bits + one bit of Odd parity
7 data bits + one bit of Mark parity
7 data bits + one bit of Space parity
For ASCII data, 8 bits no parity equals 7
bits with space parity.
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