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COMSPHERE 3920Plus Modems
Model Number 3920-A2-xxx
Installation Instructions
Document Number 3920-A2-GK47-10
February 2002
Overview
The COMSPHERE Model 3920Plus modems are full-feature, high-speed leased modems, providing reliable
asynchronous and synchronous operation over leased or dial-line networks with data rates as high as 33,600 bps.
The COMSPHERE 3920Plus modem is available in several models. This document refers to model numbers in
the 3920-A2 series, which are singleport modems with single-rate power supplies. Modems in the 3920-A1 series
have universal power supplies and are described in the COMSPHERE 3900 Series Modems, Models 3920Plus
and 3921Plus, Installation Instructions, Document No. 3920-A2-GK41.
Through downloading capability, any Model 3920Plus modem is upgradable to the latest firmware, requiring no
new hardware investment or on-site personnel, with little or no downtime. For more information on downloading
capability, refer to the Automatic Firmware Download section in Chapter 3 of the COMSPHERE 392xPlus
Modems, Models 3920Plus and 3921Plus, Technical Reference Manual, Document No. 3920-A2-GH30.
NOTE: Do not download firmware with a release number lower than 4.0 to a Model 3920-A2-xxx modem.
Model 3920Plus modems support a wide range of modulation schemes and offer control using either AT
commands, the diagnostic control panel (DCP) or the optional COMSPHERE 6700 and 6800 Series Network
Management Systems (NMS). The NMS performs extensive monitoring, testing, reporting, and restoral functions
to assist in managing your network.
Model 3920Plus modems are compatible with a number of dialing methods and protocols, such as asynchronous
AT commands, CCITT V.25bis dialing, and the DCP. The DCP allows you to use the Model 3920Plus modem in
a variety of applications and environments while also providing control over modem configuration, dialing, and
diagnostics. The Model 3920Plus modems come with preset factory configurations that are the most often used
modem settings.
This document provides the following information:
• A description of the 3920Plus modem
• A list of equipment supplied with the modem
• A list of customer supplied equipment
• Installation instructions
• A 392xPlus Menu tree
• Important safety instructions
• Regulatory notices
• Government requirements and equipment return information
3920-A2-GK47-10
February 2002
1
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Related Manuals for Zhone COMSPHERE 3920Plus
Summary of Contents for Zhone COMSPHERE 3920Plus
- Page 1 33,600 bps. The COMSPHERE 3920Plus modem is available in several models. This document refers to model numbers in the 3920-A2 series, which are singleport modems with single-rate power supplies. Modems in the 3920-A1 series have universal power supplies and are described in the COMSPHERE 3900 Series Modems, Models 3920Plus and 3921Plus, Installation Instructions, Document No.
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Page 2: Ordering Information
Call your sales representative to order additional product documentation or to verify the correct model number for your geographic area. COMSPHERE 3920Plus Modem The Model 3920Plus singleport modem is a standalone modem (Figure 1) capable of either 4-wire/2-wire leased-line or dial operation. This modem is controlled using either AT commands or the DCP. The DCP consists of a liquid crystal display (LCD), three function keys, four directional keys, and a row of 13 LED status indicators. -
Page 3: 392Xplus Modem Package
392xPlus Modem Package After opening the modem’s package, check for damage and verify that the following items are present: • Installation instructions • Model 3920Plus modem • Power supply • One 6-position, 4-wire modular cord (in selected models) • One 8-position, 8-wire modular cord (in selected models) If any hardware components are damaged, notify your sales or service representative. -
Page 4: Connecting Cables To The Model 3920Plus Modem
Model 3920Plus Input Voltage Requirements The power supply used with model number 3920-A2-201 is a wall-mount transformer designed for 110 vac. Additional models are available for other voltages and plug types. Use only the power supply included with your modem. Connecting Cables to the Model 3920Plus Modem Figure 2 illustrates the Model 3920Plus modem cable connections. - Page 5 Data Terminal Equipment Connection Use the following steps to connect an EIA-232-D cable from the modem to a DTE: 1. Make sure the modem is powered OFF. 2. Connect the DB-25-P (plug) connector on the cable to the DB-25-S (socket) connector (Figure 2) on the modem’s back panel, labeled DTE 1.
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Page 6: Removing And Replacing The Model 3920Plus Modem
Leased Backup Connection Use the following steps to connect the modem to the 2-wire leased backup network interface: 1. Insert the 8-position, 8-conductor modular plug into the jack labeled DIAL (Figure 2). 2. Insert the other end of the modular cord into the leased-line network interface. Dial Backup Connection Use the following steps to connect the modem to the dial network interface: 1. -
Page 7: Selecting Factory Configuration Options
Model 3920Plus Modem Power-Up Once your modem is properly connected to the power supply, leased and/or dial lines, and the DTE, press the modem’s back panel power switch to the ON position. The modem begins a power-up self-test, in which all DCP LEDs light. -
Page 8: Menu Tree
Using the Diagnostic Control Panel (DCP) The DCP’s liquid crystal display (LCD) consists of two 16-character lines which display modem status, control functions, and configuration options as well as indicating your location in the Top-Level menu tree. To change a factory template from the Sync Leased preset configuration using the DCP, perform the following steps: 1. - Page 9 Displays current status of modem along with "Status" (Singleport mode data rate and error control mode. only) Status Configure PList Control Test SubHS Call_Setup Tlk/Data Security Remote (Dial Ld EditArea frm: (Tributary Backup Choose Address only) only) (TMp Control only) Activ Display Clear...
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Page 10: Important Safety Instructions
Important Safety Instructions 1. Read and follow all warning notices and instructions marked on the product or included in the manual. 2. Slots and openings in the cabinet are provided for ventilation. To ensure reliable operation of the product and to protect it from overheating, these slots and openings must not be blocked or covered. 3. -
Page 11: Government Requirements And Equipment Return
Notices WARNING THIS EQUIPMENT HAS BEEN TESTED AND FOUND TO COMPLY WITH THE LIMITS FOR A CLASS A DIGITAL DEVICE, PURSUANT TO PART 15 OF THE FCC RULES. THESE LIMITS ARE DESIGNED TO PROVIDE REASONABLE PROTECTION AGAINST HARMFUL INTERFERENCE WHEN THE EQUIPMENT IS OPERATED IN A COMMERCIAL ENVIRONMENT. - Page 12 4. If the 3920Plus modem causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. But if advance notice is not practical, the telephone company will notify the customer as soon as possible. Also, you will be advised of your right to file a complaint with the FCC if you believe it is necessary.
- Page 13 Repairs to certified equipment should be made by an authorized Canadian maintenance facility designated by the supplier. Any repairs or alterations made by the user to this equipment, or equipment malfunctions, may give the telecommunications company cause to request the user to disconnect the equipment. Users should ensure for their own protection that the electrical ground connections of the power utility, telephone line and internal metallic water pipe system, if present, are connected together.
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