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3.1.1 N
ETWORKING
The Phone Line Managers can be networked together to provide additional IST
device ports, telephone line ports, or both. The networking method you choose
will depend on the quantity of IST devices, the telephone line use, and the
application. Please note that the following examples use 4 x 12 units. The same
connections apply to 4 x 12 or 8 x 24 units. If you have further questions about a
networking application or need assistance in setting the DIP switches on the Phone
Line Manager in a networked application, please contact Black Box Technical
Support at 724-746-5500.
Example #1: Providing Additional IST Device Ports
When an application requires more IST ports than one Phone Line Manager can
provide, two or more Phone Line Manager units can be networked together, by
connecting IST ports on the first Phone Line Manager to the line ports on the
second Phone Line Manager. Providing more than one networking connection
between the two Phone Line Manager units will permit more than one IST device
on the second Phone Line Manager to simultaneously access the telephone lines
on the first Phone Line Manager. A 3 to 1 ratio of devices to lines is typical. Your
particular application may be different. The goal is to be able to provide dial tone
and outbound call capability to all outbound IST devices. Networking two 4 x 12
units together in this manner will effectively create a 4 x 20 Phone Line Manager.
Networking two 8 x 24 Phone Line Managers together will create an 8 x 40 Phone
Line Manager, while networking three 8 x 24 Phone Line Managers together will
create an 8 x 56 Phone Line Manager.
4 x 12 LineShare (1st)
4 x 12 Phone Line Manager (1st)
4 Telephone
Lines
M
L
ULTIPLE
INESHARE
8 IST
Devices
Figure 3-1. 4 x 20 Network Application.
CHAPTER 3: Installation
U
T
NITS
OGETHER
4 x 12 Phone Line Manager (2nd)
4 x 12 LineShare (2nd)
Network
Links
12 IST
Devices
13
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