Verilink 2000 (34-00182) Product Manual Manual de usuario descargar pdf (Pagina 22)

2-10 INSTALLATION

DTE

Connection

The equipment side DTE interface of the CSU is a DSX interface. The DTE line

build out (LBO) level should be set as instructed in Configuration Switch S3 on

page 2-4.

The DTE physical interface for both the stand-alone unit and the chassis mounted

unit is a standard RJ-48C 8-pin modular jack. A DB-15 backplane is also an

option for the network and DTE interfaces. The pinout assignments are shown in

Table 2-7.

Network

Connection

The network side of the CSU is referred to as the network interface. This interface

contains an ALBO to allow the unit to be located a substantial distance away from

the telco network interface (receive signal level down to -27 dB).

The network interface line build out (LBO) levels should be adjusted as instructed

in on page 2-4. The maximum suggested cable lengths for units connected to the

network are listed in Table 2-8.

Calculations are based on a 70°F cable temperature, 0.083-µF/mile capacitance, a

27-dB line loss, and a 100-Ω, non-loaded, twisted pair cable; PIC refers to Plastic

Insulated Cable.

The network physical interface for both the stand-alone unit and the chassis

mounted unit is a standard RJ-48C, 8-pin modular jack. A DB-15 backplane is

also an option for the network and DTE interfaces. The pinout assignments are

shown in Table 2-9.

Table 2-7

DTE RJ-48 and DB-15 Interface Pinouts

Pin RJ-48 Interface Pin DB-15 Interface

1 Data Out 1 Data In

2 Data Out 2 Frame Ground

3, 6 Not Used 3 Data Out

4 Data In 4 Frame Ground

5 Data In 9 Data In

7, 8 Chassis Ground 11 Data Out

Table 2-8

Maximum Cable Lengths for Various Cable Gauges

Cable Type Loss per 1000' Max. Length

26-gauge PIC 6.8 dB 4,400 ft

24-gauge PIC 5.4 dB 5,500 ft

22-gauge PIC 4.2 dB 7,100 ft

19-gauge PIC 3.0 dB 10,000 ft

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 57 58

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Verilink 2000 (34-00182) Product Manual Manual de usuario Pagina 22