Polycom VSX Series - Manual (Page 75)

Configuring Network Use
3 - 19
Configuring ISDN Support
You can add one optional network interface module to the VSX 5000,
VSX 7000, VSX 7000s, VSX 7000e, and VSX 8000 systems. This lets you extend
the functionality of the systems so that you can:
• Make ISDN calls over a BRI network.
• Make ISDN calls over a PRI/T1 network (in North America and Japan) or
PRI/E1 (outside of North America and Japan) with the VSX 7000,
VSX 7000s, VSX 7000e, or VSX 8000.
• Connect encryption or other third-party network equipment using a Serial
V.35/RS-449/RS-530 interface with the VSX 7000, VSX 7000s, VSX 7000e,
or VSX 8000.
The VSX 3000 or VSX 3000A (ISDN model) includes a BRI network interface
for ISDN calling.
The VSX 5000 with an optional BRI module supports ISDN calling.
This section describes the settings for all optional network interfaces and
identifies the settings that are available for specific network interfaces.
You can configure a network interface option if the corresponding network
interface module is installed. The system automatically detects the type of
interface installed and displays only the required configuration screens.
Configuring the BRI Network Interface
To configure the ISDN network interface settings:
1. Go to System > Admin Settings > Network > ISDN.
2. Configure these settings:
Setting Description
Enable ISDN
H.320 Allows this system to make H.320 (ISDN) calls.
Number of ISDN
Channels to
Dial in Parallel Specifies how many channels to dial at one time.
You can specify up to eight channels. If you experience
network problems, decrease the number.
Outside Line
Dialing Prefix Specifies the ISDN dialing prefix used to call outside the
network.
Numbering
Plan Select the appropriate numbering plan for your location, if it
differs from the default.