Product manual

Product Manual - DM991 Series V Family - 204.4092.08 22
4. V.35-V36/V.11 DIGITAL INTERFACE
The DB25 connector follows the ISO2110 Amd. 1 recommended pinout, for the V.35 interface as well as
for the V.36/V.11.
In the DM991S/SE modems, that pinout can be altered to the Telebrás standard through the straps.
Interface V.35
In the case of DM991S/SE modems, that pinning can be changed to the Telebrás standard through
straps.
In the case of DM991C/CE modems, you have the option of asking for equipment with a pinning
selections between ISO2110 Amd.1 and Telebrás standard through straps.
Data and clock signals are the differential balanced type, according to ITU-T’s V.11 recommendation.
Signals CT107, CT108, CT109, CT140, CT141 and CT142 follow the characteristics of recommendation
V.28 (compatible with recommendation V.10). Control signals CT105 and CT106 can be configured by
straps to follow the characteristics of recommendation V.28 (for V.35) or V.11 (for V.36/V.11).
The ETD can provide synchronism for data receiving through CT128.
The digital interface can be set up in rates from Nx64kbit/s to 2,304kbit/s on 2-wire modems (2W), and up
to 4,608kbit/s on 4-wire modems (4W).