DM16E1 / DM4E1 Operation and Installation Manual - 204-4001-19
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5.
V.35 AND V.36/V.11 DIGITAL INTERFACES
The DM16E1 and DM4E1 have a digital interface that is selectable via straps (V.35 or V.36/V.11 interface).
This interface is available at a DB25 connector located on the rear panel following ISO2110 Amd.1 pinout
recommendations for both V.35 and V.36/V.11.
It is important to note how easy it is for the DTE to synchronize the reception of data from the MUX via
CT128. For correct functioning, the clock supplied by the DTE must be bound with the incoming data rate,
thus preventing the occurrence of slips and consequent data errors.
The port has an alternative configuration for reception data (CT104), which can be synchronized with the
external transmission clock (CT113). This characteristic is very useful when the digital interface is linked to
NewBridge
®
equipment operating as DCE.
The interface rate can be configured as fractional (Nx64 kbit/s), being transmitted to the aggregate as
structured E1, with G.704-compatible frame.
5.1. V.35 Interface
At this interface, data signals and clocks are of differential balanced type, in accordance with appendix II of
recommendation V.35. Control signals follow the characteristics of recommendation V.28. Table 8 shows
the interface signals and their pinout, both for the rear panel female DB25 (ISO2110 Amd.1) and the 34 pin
female connector for the cable adaptor (ISO2593).
5.2. V.36/V.11 Interface
At this interface, data signals and clocks are of differential balanced type, in accordance with ITU-TS V.11
recommendation. Table 9 shows the conversion signals and their pinout, both for the rear panel female
DB25 (ISO2110 Amd.1) and the 37 pin female connector for the cable adaptor (ISO4902).
