User's Guide

Table Of Contents
Help Hot Line (U.S. only): 1-800-530-9960 7-73
D-620610-0-20 Rev B CONFIDENTIAL
Alarm Monitoring Connectivity Options
7.8.4 POTS Line Sharing Switch Connection
Using a line sharing switch, you can connect up to four modems to a single telephone
line. Testing was performed with a Teltone Line Sharing Switch, model number
M-394-B-01.
Figure 7-57 OA&M Connection Using a POTS Line Sharing Switch
Up to 16 modems can be monitored using a single telephone line by cascading line
sharing switches, as shown in Figure 7-58.
Modem
PSTN
Line Sharing Switch
Up to 4 modems
per Switch
Modem
Modem
Straight-through
modem cable
Straight-through
modem cable
PC running
Software
Standard Browser
Standard phone cable