Determining The External Equipment Type - FALCOM TANGO55/i Hardware Description

TANGO55/ & TANGO56/
I
Multiplex, Duplex
Time slots per TDMA frame
Frame duration
Time slot duration
Modulation
Receiver input sensitivity @ ARP
BER Class II < 2.4 %
Table 6: Air Interface

2.6 Determining the External Equipment Type

Before you connect the DB9 serial port connectors on the aforementioned terminals
(DCE units) to external equipment, you need to determine if the external hardware
serial ports are configured as DTE or DCE.
The terms DTE (Data Terminal Equipment) and DCE (Data Communications
Equipment) are typically used to describe serial ports on devices. Computers (PCs)
generally use DTE connectors and communication devices such as modems and
DSU/CSU devices generally use DCE connectors. As a general rule, DTE ports
connect to DCE ports via straight through pinned cables. In other words, a DTE port
never connects directly to another DTE port. Similarly, a DCE port never connects
directly to another DCE port. The signalling definitions were written from the
perspective of the DTE device; therefore, a Receive Data signal becomes an input
to DTE but an output from DCE.
TANGO55/i and TANGO56/i
aforementioned conventions for DCE-DTE connections it communicates with the
customer application (DTE) using the following signals:
TANGO55/i and TANGO56/i
Terminal (DCE)
TxD
RxD
RTS
CTS
DTR
DSR
DCD
RING
Table 7: The signaling definitions between DTE and DCE.
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
I
GSM 850
GSM 1800
PCS 1900
are designed for use as a DCE unit. Based on the
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TDMA/FTDMA, FDD
8
4.615
577
GMSK
-102 -107
-102 -106
-102 -105.5
to
V 1.03
ERSION
ms
µs
dBm
dBm
dBm
Application (DTE)
TXD
RXD
RTS
CTS
DTR
DSR
DCD
RING
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