Memotec CX900e, Hardware Reference Manual, Page: 29 / 200

1 OVERVIEW
3006M100-002
1-5
1.2.4 I/O Cards
All Serial I/O card ports can be configured for DTE or DCE operation.
V.24 Serial I/
Card The V.24 Serial I/O card provides a single port with unbalanced signals for
control, data, and timing. The card supports synchronous or asynchronous
transmission at speeds up to 128 Kbps.
Multi I/O Card
The Multi-I/O card provides five V.24 ports which fully comply with ITU-T’s
V.24 and EIA-232D standards. The card uses a high-density DB-60 connector fo
connection to the external devices. A special breakout (octopus) cable is used to
distribute the I/O signals to five DB-25 connectors. Each V.24/EIA-232 port can
support synchronous or asynchronous transmission at speeds up to 128 Kbps.
X.21 Serial I/
Card
The X.21 Serial I/O card provides a single port which supports the X.21 standard.
The card supports synchronous transmission at speeds up to E1 (2.048 Mbps).
V.35H Serial
I/O Card
The V.35H Serial I/O Card provides a single port which supports the V.35
standard. However, it uses a V.11 driver/receiver for data and timing signals
through a DB-25 port for connection to external devices. An adapter cable is used
to provide the physical V.35 connector. The card supports synchronous
transmission at speeds up to 2.048 Mbps.
V.35EU Serial
I/O Card
The V.35 (European Union version) Serial I/O card provides a single port which is
fully compliant to the V.35 standard. The card supports synchronous transmission
at speeds up to 2.048 Mbps.
Universal I/O
Card
The Universal I/O card supports five serial ports with maximum port speeds of
2.048 Mbps. The physical interface for each port is independently configurable
for V.24, V.35, or X.21. A custom breakout cable is required for the single high-
density port connector. The cable provides DB-25 connectors which, through th
use of adapters, provide V.24, V.35, and X.21 connections (in any combination).
Analog Voice
I/O Card
The Analog Voice I/O card features one analog voice/fax port controlled by an
FXO, FXS, or an E&M (two-wire or four-wire) Line Interface Driver. The card
uses a C31 Digital Signal Processor (DSP) to provide voice compression and
signaling.
Dual Analog
Voice I/O Card
The Dual Analog Voice (DAV) I/O cards enable the CX900e to transmit and
receive voice and fax data. Each card supplies two analog voice/fax ports
controlled by FXO, FXS, or E&M SLIM Line Interface Drivers (SLIM LIDs).
The card uses a C54 Digital Signal Processor (DSP) to provide voice compression
and signaling.
Token Ring I/O
Card The Token Ring I/O card supports both Type 1 (DB-9) and Type 3 (RJ-45) devices
of which only one may be configured as the active port. The DB-9 connector
provides a Token Ring connection to networks using shielded, twisted-pair (STP