PassFinder AP2520 VoIP Router/Gateway Operation Manual
Version 1.10 / Mar. 2002
AddPac Technology Co., Ltd.
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2.2.3.
Prerequisites for Network Connection
Observe EIA standards and limitations when installing the Gateway
The following section describes the synchronous serial cable, Ethernet Cable
and the Console Cable PassFinder AP2520 supports.
2.2.3.1.
Synchronous Serial Cable
Before connecting an equipment to the synchronous serial port, labeled
“Serial” on the rear side of the router, the following must be determined.
z
Whether the equipment to be connected to the WAN(Serial) interface is a
DTE or DCE.
z
Whether the connector type is a Male or a Female.
z
The required standard of the equipment.
2.2.3.1.1.
DTE and DCE
The equipment communicating in connection to the synchronous Serial
interface could be either DTE(Data Terminal Equipment) or DCE(Data
Circuit-Terminating Equipment). The DCE equipment provides Clock Signal for
communication between the router and the equipment. The DTE equipment
does not provide Clock Signal. Table 2-1 describes the general DTE and DCE
equipment, to be used when the difference is unclear.
Equipment Type
Connector Type
General Equipment
DTE
Male
Terminal, PC
Pouter
DCE
Female
Modem, DSU / CSU
Multiplexer
[ Table 2-1 The General DTE/DCE Equipment]
Warning
STOP
