StarTech.com CABCONS1716I Manuale Utente

Instruction Manual

44

The CABCONS1716I will work with virtually any Hayes-compatible modem capable 

of recognizing the standard AT command set.  Some modem manufacturers offer 

“enterprise” grade modem products that include technology to improve the stability 

of connections; whether this type of product would be beneficial to your application 

depends on whether you consider the modem connection to be mission-critical, the 

quality of your telecom infrastructure, and your budget for implementing this solution.  

The model of modem attached is essentially transparent to the CAB

It is important to note that modems that offer “56K” (or 56,000 bps) connections often 

achieve connection speeds that are far lower than their maximum capabilities. 
Given the limitations of telecom infrastructure (many locations have yet to implement 

fully digital switching technology, and still rely on older analog technology for some 

segments), the maximum “upstream” transfer rate is limited to a maximum of 33,600 

bps between two modems; the “downstream” rate is often within a similar range for a 

typical connection.Therefore, speeds below 56,000 bps do not indicate a problem with 

the modem or the CABCONS1716I, but simply reflect the line conditions at the time the 

connection is made.
The Serial port can be used for serial port configuration when the modem is connected. 

It requires the use of a null modem serial cable.
Place the modem near the CABCONS1716I and an available telephone jack. Connect 

the  modem  to  the  telephone  jack,  data  cable,  and  power  source  according  to  the 

instructions in its documentation. The opposite end of the modem’s data cable should 

be a DB9 female serial connection. Connect that end of the cable to the Serial connection 

on the rear panel of the CABCONS1716I.

Modem 

Connection