Polycom ViewStation FX4000 User Manual page 135

© Polycom, Inc. 2002
Chapter 4 - Advanced Configuration for your Network Environment
Switch Protocol—Select your network switch protocol. For
certain Asian countries, such as Japan, Hong Kong, Taiwan,
NET5/CTR4 is also provided.
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 with "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
line encoding format respectively. Legacy frame formats such as
D4 are not supported.
CSU (PRI T1 only)—By default, the T1 PRI network interface
module is set for internal CSU mode.
If you prefer to use an external CSU, you must specify the
following information in this screen:
1. In the CSU field, select External.
2. In the Line Buildout field, select the proper cable distance
range that corresponds with the cable distance between the
PRI interface and the external CSU.
For North America T1 only: connect an RJ-45 cable from the CPE
equipment side of the external CSU to the PRI network interface
module.
For more information about the CSU, refer to PRI Technical
Information in the Polycom Office Integrators' Reference Manual.
Notes
137