Product manual

Product Manual - DM991 Series V Family - 204.4092.08 11
2. INTRODUCTION
The modem family DM991 series V has several G.SHDSL modem models, with E1 (G.703 and G.704),
Digital (V.35 and V.36/V.11) and Ethernet (10/100BaseT) interfaces.
They come in eight models:
• DM991C 2W – Desktop. Can be adapted in a sub rack, using the accessory: desktop sub-
rack adaptor. Its G.shdsl interface works on 2 wires.
• DM991C 4W – Desktop. Can be adapted in a sub rack, using the accessory: desktop sub-
rack adaptor. Its G.shdsl interface may operate with 2 or 4 wires.
• DM991CE 2W – The same as the DM991C model, however it has the option to work as
Bridge as well. Its G.shdsl interface works on 2 wires.
• DM991CE 4W – The same as the DM991C model, however it has the option to work as
Bridge as well. Its G.shdsl interface may operate with 2 or 4 wires.
• DM991S 2W – Telebrás standard card. Can be used in cabinets or sub racks standard for
20 modems. Its G.shdsl interface works on 2 wires.
• DM991S 4W – Telebrás standard card. Can be used in cabinets or sub racks standard for
20 modems. Its G.shdsl interface may operate with 2 on 4 wires.
• DM991SE 2W - The same as the DM991S model, however it has the option to work as
Bridge as well. Its G.shdsl interface works on 2 wires.
• DM991SE 4W - The same as the DM991S model, however it has the option to work as
Bridge as well. Its G.shdsl interface may operate with 2 or 4 wires.
In this manual the name DM991 will always be used to represent the entire modem family and whenever
an explanation is restricted to certain models, such model will be clearly identified.
2.1. DM991S/SE 2W/4W
2.1.1. Front Panel
Figure 1 represents the front panel of the DM991S 2W modem, the Figure 2 presents the front panel of
the DM991SE 2W modem, Figure 3 presents the front panel of the DM991S 4W modem and the Figure 4
presents the front panel of the DM991SE 4W modem.
Figure 1. Front Panel - DM991S 2W
The letter "C", represents that the equipment is a table equipment, while the letter "S" represents that it
is
a card to be used in a Telebrás standard cabinet or shelf. The letter "E" present indicates B
ridge mode
operation.