Zhone 3920Plus Manual de instrucciones descargar pdf (Pagina 22)

COMSPHERE 392xPlus Modems

1-10 October 1998 3920-A2-GH30-40

NOTE

When a 2400 V.34 modulation connection occurs on one end of a

modem pair with configuration options set for Asymmetric rates, the

other modem is 24K due to the 2400 symbol rate it uses.

Multiport Backup

When the 392xPlus multiport modem has the MUX Mode configuration option set to either

TDM/MSD or DTE Bridge, it is in Multiport mode, and either dial lines or a 2-wire leased line can

be used to back up the primary 4-wire leased line. Backup can be performed automatically upon

loss of the primary leased line, and automatic dial standby also can be used to automatically return

the modems to the primary leased line when restored.

When you use backup functions while in Multiport mode, the modem’s automode feature is forced

to Disable. This ensures that the mux is not accidentally disabled by answering a call, which is

using modulation where Multiport mode is not supported. It is important that both modems

participating in the backup are in Multiport mode with the same dial-line modulation.

Synchronous Data Compression

The 392xPlus standalone and carrier-mounted modems are available with Synchronous Data

Compression (SDC). Refer to Appendix H, Synchronous Data Compression, for more information.

Government Requirements and Equipment Return

Certain governments require that instructions pertaining to modem connection to the public

switched telephone network be included in the installation and operation manual. Specific

instructions are listed in the following sections.

United States

NOTICE TO USERS OF THE PUBLIC SWITCHED TELEPHONE NETWORK

1. This equipment complies with Part 68 of the FCC rules. On the equipment is a label that

contains, among other information, the FCC registration number and ringer equivalence

number (REN) for this equipment. The label is located on the bottom of the

Model 3920Plus modem and on the modem’s circuit card assembly on the

Model 3921Plus. If requested, this information must be provided to the telephone

company.

2. Page A of this manual contains the Universal Service Order Codes (USOC) associated with

the services on which the equipment is to be connected.

3. An FCC compliant telephone cord and modular plug is provided with this equipment. This

equipment is designed to be connected to the telephone network or premises wiring using a

compatible modular jack which is Part 68 compliant. See Installation Instructions for

details.

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Zhone 3920Plus Manual de instrucciones Pagina 22