For example, assume you require a 30-foot cable. You intend to operate your modem at 64.0 kbps. After looking at Table B-4,you determine that the maximum capacitance for the cable is 900 pF. According to the formula above, divide 900 pF by 30 feet. The result is 30 pF per foot:

900 pF

= 30 pF/ft

30 ft

Telenetics recommends you use Telenetics cables to attach your 326X modem(s) to DTE(s). Use Table B-5to select cable(s) for your application.

To use non-Telenetics cables, Table B-6provides examples of vendor cable wire length versus DTE rates for 326X stand-alone units. NOTE: The part numbers specified in Table B-6are not for complete cables, but for the wires that are available with the correct capacitance to support the higher rates of the 326X Modem.

Table B-5.

Telenetics DB-25 Low Capacitance Cables for 326X

 

Telenetics

 

 

 

 

 

Product

Up to 19.2

Up to 64.0

Up to 96.0

Up to 115.2

Description

Code

kbps (ft)

kpbs (ft)

kbps (ft)

kbps (ft)

 

 

 

 

 

 

Telenetics

92153

50

30

10

6

Male 25-Male 25

92152

 

 

 

 

Straight-through

 

 

 

 

92151

 

 

 

 

 

 

 

 

 

 

92150

 

 

 

 

 

 

 

 

 

 

Telenetics

92157

50

30

10

6

Male 25-Female 25

92156

 

 

 

 

Straight-Through

92155

 

 

 

 

 

 

 

 

 

 

92154

 

 

 

 

 

 

 

 

 

 

Telenetics

92161

50

30

10

6

Male 25-Female 25

92160

 

 

 

 

Crossover

92159

 

 

 

 

 

 

 

 

 

 

92158

 

 

 

 

NOTE: Telenetics DB-25 Cables have a conductor capacitance of 11 pF/ft and a shield capacitance of 20 pF/ft for a total capacitance of 31 pF/ft. For example, operating at 19.2 kbps, a 50-ft length of cable multiplied by a total capacitance of 31 pF/ft yields a maximum allowable cable capacitance of 1550pF, which is acceptable in accordance with Table B-4.

 

 

 

 

 

Pinouts

Interface

 

 

 

 

 

 

 

 

 

Cabling and Interface Pinouts B-9

Page 170 Page 172
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Telenetics V.34-SDC, 326X V.34, V.32bis Series manual Table B-5 Telenetics DB-25 Low Capacitance Cables for
Page 170 Page 172

326X V.34, V.32bis Series, V.34-SDC specifications

Telenetics has been a key player in the field of telecommunications, offering advanced modem solutions that cater to diverse communication needs. Among their notable products are the V.34-SDC and V.32bis series, including the 326X V.34 modem. These modems have been designed to enhance data transmission reliability and speed in various applications.

The Telenetics V.34-SDC modem represents a significant leap in technology, supporting data rates of up to 28.8 Kbps. This modem utilizes the advanced V.34 modulation scheme, which optimizes the use of existing telephone lines to deliver impressive performance, especially for users requiring high-speed data transmission. The V.34-SDC model also features robust error correction and data compression techniques, ensuring that users receive accurate data even over less than ideal connections. With its extended line-conditioning capabilities, the V.34-SDC modem can efficiently handle long distances and poor line conditions.

Equally noteworthy is the V.32bis series, which provides backward compatibility with V.32 modems, enabling seamless integration into existing systems. Capable of speeds up to 14.4 Kbps, the V.32bis modems are ideal for businesses and environments where legacy systems remain in use. It features adaptive equalization and advanced echo cancellation, ensuring a clear signal is maintained throughout the data transmission process. This versatility allows users to connect with various devices across different infrastructures.

The 326X V.34 modem further exemplifies Telenetics' commitment to high performance. It combines the V.34 capabilities with enhanced security features, offering users encryption options for sensitive data. This is particularly crucial for businesses that need to safeguard their information against potential vulnerabilities during transmission. The 326X also supports various data communication protocols, making it adaptable for multiple platforms and applications.

In summary, Telenetics’ V.34-SDC, V.32bis series, and 326X V.34 modems stand out for their high-speed data transmission, compatibility, advanced error correction, and security features. These technologies make them excellent choices for both enterprise and networking applications where reliable communication is vital. Telenetics continues to innovate, delivering modem solutions that meet the evolving demands of the telecommunications landscape.
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