Polycom viewstation fx vs4000 Manual De Usuario

Appendix A - Installation Notes

© Polycom, Inc.

A-3

ISDN Provisioning

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