Motorola 326X V.34 - Manual (Page 175)

Cabling and Interface Pinouts B-7
Inter
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ce
Pinouts
NC (Network Control) Port Pinouts
Table B-3 describes the pinouts for the IN and OUT NC (Network Control) ports.
Cabling
This section provides important information about cabling and operating the modem
at DTE rates greater than 19.2 kbps.
NOTE: 326XFAST and 326XFAST-SDC Series Modems are referred to as 326X
Series Modems here.
Caution
When operating the modem at DTE rates higher than 19.2
kbps, carefully follow the information here to determine the
cables to use with your application. For the modem to operate
as specified, Motorola has indicated the maximum capacitance
of cables to be used when operating at data rates higher than
19.2 kbps. If this method is not followed, your modem may
cause errors in data transmission. Motorola makes no guaran-
tee of proper modem operation if you do not use a cable with
the correct capacitance.
Cable Considerations
Motorola has specified a maximum allowable cable capacitance for use with the
expanded data rates of 326X modems. You must determine the correct capacitance
of the cable you intend to use with the modem.
Table B-3.
Network Control Port Connector Pinouts
Pin In Out
1 Not Connected User Special In
2 TXD In TXD Out
3 RXD In RXD Out
4 RTS In RTS Out
5 Not Connected Not Connected
6 Not Connected User Special Out
7 Ground Ground
8 DCD In DCD Out
“In” signals use a DCE-type interface. This type of interface connects directly to the
DTE-type interface provided by Motorola Network Management Systems.
“Out” signals use a DTE-type interface. This type of interface may connect to a Motorola
network-managed product.