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Appendix A - Installation Notes
© Polycom, Inc. A-3
ISDN Provisioning
ISDN PRI
The PRI T1 needs to be provisioned for the ViewStation FX and VS4000 systems as
follows:
The PRI direct from the telephone service provider should support both data and
voice for Polycom’s voice add-on capability of systems.
Line settings ESF/B8ZS (default)
Extended Super Frame B8ZS is modem standard for T1/PRI line
encoding and framing
Line termination
type
CPE (user side) only
The required termination is built into the system and most access
switches
Supported PRI
switch protocols
AT&T 4ESS, AT&T 5ESS, NI-1, NI-2, Siemens, Nortel DMS 100,
and Nortel 250
These are standard protocols for North America
Number of channels 23 B-channels dialable at 64 or 56 Kbps, and one D channel
Ensure that you have 64 Kbps clear channel service
Number of network
interfaces
1 (single PRI)
Line build-out modes DSU+CSU (0 to –22.5dB attenuation), DSU-only (DSX 0-665
feet)
Physical distance is offset by the settings in the user interface
Clocking Must be derived from the external network or the PBX
Terminal Endpoint
ID (TEI)
0-63
This identifies the PRI endpoint; the common default is 0
Numbering One local directory number per interface (23 channels)
D-channel slot
number
24
Included to verify where the D channel is; this is where additional
diagnostic information resides
Call-by-call service
codes
Values 0-31 service codes for GVPN/PN/UPN network-specific
services