Black Box FX6412OA Manual page 15

PLUG AND PLAY PHONE LINE MANAGER XLO (OUTGOING ONLY)
In the previous example, IST devices on the first and the second Phone Line
Manager will have equal outbound access to the four telephone lines since four
network links have been provided.
Example #2: Providing Additional Line Ports and Device Ports
If the quantity of telephone lines and IST devices that are required for your
application exceeds the capacity of one Phone Line Manager, then two or more
Phone Line Manager units can be "networked" together. In this application, to
increase the Phone Line Manager capacity to handle the quantity of lines and
device ports you need, connect one half of the telephone lines to the first Phone
Line Manager and the other half of the telephone lines to the second Phone Line
Manager while leaving at least one Line port and one IST port open on each
Phone Line Manager for networking. By connecting Line Port #1 on the first
Phone Line Manager to the last IST port on the second Phone Line Manager and
by connecting Line Port #1 on the second Phone Line Manager to the last IST port
on the first Phone Line Manager, an outgoing call from any IST port can access
the telephone lines on any networked Phone Line Manager.
Networking two Phone Line Manager units together in this manner will allow
an IST device to search and gain access to an available telephone line connected to
either Phone Line Manager. Networking two 4 x 12 units together will effectively
create a 6 line x 22 IST port Phone Line Manager. Networking two 8 x 24 Phone
Line Managers together will create a 14 x 46 Phone Line Manager, while
networking three 8 x 24 units will create a 21 x 69 Phone Line Manager.
4 x 12 Phone Line Manager (1st)
4 x 12 LineShare (1st)
3 Telephone
Lines
14
11 IST
Devices
Figure 3-2. 6 x 22 Networked Application.
4 x 12 Phone Line Manager (2nd)
4 x 12 LineShare (2nd)
3 Telephone
Link
Lines
Link
11 IST
Devices