Verilink PRISM 4101 (34-00230) Product Manual - Manual (Page 21)

Port Connections 9
DDS The DDS network is connected through a standard RJ-48S (8-pin modular)
connector labeled DDS. The pinout assignments are displayed in Table 2-4.
In accordance with FCC Rules, Part 68.218(b), you must notify the telephone
company prior to disconnecting this product.
The network side of the PRISM 4101 is referred to as the network interface. This
interface contains an ALBO (automatic line build-out) allowing the unit to be
located a substantial distance away from the telco network interface with a receive
signal level down to -45 dB.
Maximum suggested cable lengths for the connections from the PRISM 4101 to
the network are listed in Table 2-5.Calculations are based on a cable temperature of
70
°
F, 0.083
µ
F/mile capacitance, a 45 dB loss at 7 km or 22 kft of 24 American
Wire Gauge (AWG) solid twisted plastic insulated cable (PIC).
RS-232 Data Port The RS-232 data port is a female, DB-25 connector that provides an RS-232
electrical interface. Pin functions for the interface are listed in Table 2-6.
Only one data port connection can be made at any given time. If the V.35 port is in
use, the RS-232 port unavailable.
FCC rules require that interconnecting cables carrying high speed data be shielded
appropriately in order to minimize radio frequency interference.
Table 2-4 RJ-48S Pinout Assignments
Pin DDS Interface
1 Data Out (Tip)
2 Data Out (Ring)
3 Not Used
4 Not Used
5 Not Used
6 Not Used
7 Data In (Tip)
8 Data In (Ring)
Table 2-5 Maximum suggested network cable lengths
Type Loss per 1000 feet Max Cable Length
26 gauge PIC 6.8 dB 4,400 feet
24 gauge PIC 5.4 dB 5,500 feet
22 gauge PIC 4.2 dB 7,100 feet
19 gauge PIC 3.0 dB 10,000 feet
✍