User guide

Introduction
MultiModemISI Hybrid Server Cards, ISIHP & ISIHI Series 11
From the perspective of the server PC, the ISIHP-4S/4U is an sixteen-
port serial card with sixteen devices permanently attached to the serial
ports (Figure 1-2). The first eight ports are the four terminal adapters,
each of which appear as two ports. The remaining eight ports are the
eight central site modems. The following chart summarizes the
correlation of ports and devices. The ISIHP-4SD contains terminal
adapters only; no modems are present.
3456
RJ-45 Jack
TA
Modem
Modem
9
1
2
10
3456
RJ-45 Jack
TA
Modem
Modem
11
3
4
12
3456
RJ-45 Jack
TA
Modem
Modem
13
5
6
14
3456
RJ-45 Jack
TA
Modem
Modem
15
7
8
16
Figure 1-2: Modems and Terminal Adapters of ISIHP-4S/4U (for ISIHP-4SD, no
modems are present)