User`s guide

58 DC 900-1343D
DDCMP Programmer’s Guide
3.4 Line Mode Option
This option selects the mode of serial communications, either synchronous or asynchro-
nous. This option also affects the allowed data rate values (see Table 3–1).
3.5 DDCMP Version Option
This option selects the DDCMP version, either DDCMP I2 or DDCMP 4.0.
3.6 Electrical Interface Option
The electrical interface option applies only to the ICP2432 (such as in the Freeway
1100/1150) and allows the electrical interface for each link to be set. The valid values are
EIA-232 (default), EIA-449, EIA-530, and V.35.
3.7 Maintenance Mode Option
This option allows setting of DDCMP maintenance mode to either zero (no mainte-
nance allowed), or to specify maintenance mode state 1 (off) or maintenance mode
state 2 (on). In any of the three modes, any maintenance message received by the ICP
causes a DLI_PROT_RECV_DATA
dlRead response code in the dlRead
pOptArgs.usProtCommand field (see Section 2.6.1.1 on page 49).
See Section 2.6.2.8 on page 53 through Section 2.6.2.10 on page 53 for how the ICP
handles circuit exceptions relating to maintenance mode.