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13-20 AUDIX System Administration
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• modem initialization string
The modem initialization string is the character string that the TN539 or TN539B sends to initialize the
modem connected to the corresponding RS-232 port. You can enter up to 65 printable ASCII
characters; however, not all modems will accept that many. Most modems do not distinguish between
upper- and lower-case letters, so you may enter them either way. If you are using an AT&T supported
modem, you can get the appropriate dial string from the modem initialization string on the
system : translation : network port form. If you are using modems other than the ones
specified in this document, check the documentation shipped with the modem to determine the
appropriate dial string and the number of characters allowed in the string. Usually, the ‘‘at’’ at the
beginning of the string and spaces in the string are not counted as part of the string.
— If the RS-232 channels are cabled directly to another system, leave this field blank.
— If the RS-232 channels are cabled to the switch through an MPDM/M1*, leave this field blank.
— If the RS-232 channels are cabled to the switch through a 7400A or 7400B, enter:
at &c1 &r1 &d2 &s0 s0=1 &w
— If the RS-232 channels are cabled to the switch through an AT&T Paradyne DM424 (or DL424),
enter one of the following. The same string should be used for the modem at the called system:
• for MNP 19.2 Kbps mode, enter:
at&f *f3 *e3 s0=1 s2=128 m0 &w
• for non-MNP mode, fixed at 9600 bps, enter:
at&f *f3 s0=1 s2=128 m0 *e0 *s1 &w
— If AT&T 2296A modems are used, enter one of the following:
• for MNP 19.2 Kbps, enter:
at&f &d2 &c1 s0=1 m0 \n3 \j0 \q2 \g1 \a2 \v1 \t2 &w
Do not use MNP with a 2296 unless it is calling another 2296.
• for non-MNP mode fixed at 9600 bps, enter:
at&f &s0 &d2 &c1 s0=1 m0 s2=128 &w
— If a MICROCOM QX 3296/C modem is used, enter one of the following. The same string should
be used for the modem at the called system. Enter the string exactly as shown. It already
approaches the maximum number of characters allowed by this modem (40 characters; spaces
shown are not included in the 40 characters):
• for MNP 19.2 Kbps mode, enter:
at&f&d2&c1s0=1m0s2=128 \n3 \j0 \q2 \g0 \a2 %l0&w
(The character after the ‘‘%’’ is the letter ‘‘l’’.
• for non-MNP mode, fixed at 9600 bps, enter:
at&f &s0 &d2 &c1 s0=2 m0 %l0 \x1 \j0 s2=128 &w
The character after the ‘‘%’’ is the letter ‘‘l’’.