Chapter 1 Getting Started
ViewStation FX/VS 4000 User’s Guide 30 www.polycom.com
PRI Setup (T1)
If you have a PRI T1 interface box, the following screens will appear:
Figure 1-20. PRI Setup Screen
Information for the fields on this screen is available from your PRI
service provider. You can set the following options on this screen:
• Switch Protocol—Select your network switch protocol.
For T1, NET5/CTR4 is also provided for certain Asian countries,
such as Japan, Hong Kong, Taiwan.
If you change the country settings, a new set of PRI switch
protocols is loaded.
If the current switch protocol is no longer available, you will be
prompted “Do you wish to continue?” If you do, the current
switch protocol will be changed to the default for the selected
country. This will cause a reset of the PRI interface.
If more than one switch protocol is supported, you must find out
from your telephone service provider which protocol to select.
The PRI Network Interface module originates and accepts data
calls only and does not work with incoming PRI choice calls or
non-PRI lines of any kind. Special services such as caller ID
blocking and call forwarding are not supported.
• Line Signaling—Extended Super Frame (ESF)/Binary 8 Zero
Substitution (B8ZS) are the default framing format and default
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