XtendLan XL-GDB101E, Руководство пользователя

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XtendLan XL-GDB series User’s Guide
1.2.1 Operation
Figure 1.1 XL-GDB with external AC power architecture
The XL-GDB receives its power from the AC power source via an AC adapter provided by
XtendLan. In E1 or Fractional E1 mode (also in T1 or Fractional T1 mode), the local equipment
(i.e.: router or PBX) supplies data at full or fractional E1 speed to the G.703 data port of the
XL-GDB. The XL-GDB produces a digitized data stream, which is transmitted over the single
copper pair to the line port of its associated XL-GDB line interface card.
The XL-GDB interface card then directs the data stream to the central office switch or other central
office equipment for transmission to its destination. Payload rate can be automatically adjusted
downwards until it finds the highest speed it can sync to the remote unit, thereby maximizing the
rate and reach. At the central office site, manual rate selection can be performed. It has to base on
what fixed rate service is desired. Utilizing the V.35 or 10/100Base-TX data port, the XL-GDB
SHDSL system can support un-channelized data rates up to 2.304 Mbps.
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