XtendLan XL-GDB101E, Руководство пользователя

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XtendLan XL-GDB series User’s Guide
type interface. It uses multiple-wire to carry data and control signals. RS-449 and EIA-530 have
two timing signals produced by the DCE andsupplied to the DTE. The pin lists for the interface
connectors appear in Appendix A. RS-449 interface uses the EIA-530 interface module in
combination with a
converter cable, which adapts the DB25 connector to DB37 connector.
1.2.2.4 E1 (G.703)
The G.703 (E1) interface uses one pair to carry digital data. This interface transfers data at full
E1 rate of 2.048 Mbps or at any available Fractional E1 rate. The E1 clock signal is either
synchronized to the network (CO) or recovered by the CPE. The detailed features of E1 are:
•
Bit Rate: Nx64Kbps, 1<=N<=32
，
192 ~ 2048Kbps.
•
Frame Format: UNFRAMED or Structured FRAME and selectable with FAS,FAS+CRC
and UNFRAME mode.
•
Impedance: 120 ohms & 75 ohms.
•
Line Code: HDB3 (High Density Bipolar of Order 3)
XL-GDB101E working over 2 wires (1-pair). XL-GDB102E is able to combine 4 wires (2-pairs) to
extend transmition distance.
1.2.2.5 T1
The T1 interface uses one pair to carry digital data. This interface transfers data at T1 rate of 1.536
Mbps or at any available Fractional T1 rate. The T1 clock signal is either synchronized to the
network (CO) or recovered by the CPE.
•
Bit Rate: Nx64Kbps, 1<=N<=24
，
192 ~ 1544Kbps.
•
Frame Format: SF, ESF or UNFRAMED selectable.
•
Impedance: 100 ohms
•
Line Code: AMI or B8ZS selectable.
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