Verilink 2000 (34-00182) Product Manual - Manual (Page 22)

2-10 I NSTALLATION
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