The basic principle of the VFB single board is described as follows:
FA16 CB02VFB Panel Description
Table 1 VFB panel and description
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RUN: Running status indicator |
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Red light 0.25s on 0.25s off cycle blinking |
Veneer startup |
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Red light 1s on 1s off cycle blinking |
VFB is working normally |
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External Interface
VFB interfaces are distributed on the backplane of the single board or the corresponding adapter board, and the interface descriptions are shown in Table 2.
|
Interface |
Function |
Position |
Connection Description |
|---|---|---|---|
|
16 2-wire audio interfaces or 8 4-wire audio interfaces |
Audio User Access |
Backplane (rear maintenance frame) |
Connects to the patch panel using 32-way user cables (ports 0 to 7, 24 to 31). |
|
SLTF (front maintenance frame) |
Use 32-way user cables (0 to 7, 24 to 31 ports) to connect to the patch panel. |
FA16 VFB DIP Switch Settings
The VFB provides eight dip switches, S011, S031, S051, S071, S091, S111, S131, and S151, as shown in Figure 3.
DIP switches S011 to S151 are used to set the impedance of the 16 2-wire audio interfaces, and the setting instructions are shown in Table 3.
|
DIP Switch |
Setting |
Meaning |
Factory setting |
|---|---|---|---|
|
S011-1 |
ON |
Port 1 adopts 600Ω impedance. |
ON |
|
OFF |
Port 1 adopts 1650Ω impedance. |
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|
S011-2 |
ON |
Port 2 adopts 600Ω impedance. |
ON |
|
OFF |
Port 2 adopts 1650Ω impedance. |
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|
S031-1 |
ON |
Port 3 adopts 600Ω impedance. |
ON |
|
OFF |
Port 3 adopts 1650Ω impedance. |
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|
S031-2 |
ON |
Port 4 adopts 600Ω impedance. |
ON |
|
OFF |
Port 4 adopts 1650Ω impedance. |
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|
S051-1 |
ON |
Port 5 adopts 600Ω impedance. |
ON |
|
OFF |
Port 5 adopts 1650Ω impedance. |
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|
S051-2 |
ON |
Port 6 adopts 600Ω impedance. |
ON |
|
OFF |
Port 6 adopts 1650Ω impedance. |
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|
S071-1 |
ON |
Port 7 adopts 600Ω impedance. |
ON |
|
OFF |
Port 7 adopts 1650Ω impedance. |
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|
S071-2 |
ON |
Port 8 adopts 600Ω impedance. |
ON |
|
OFF |
Port 8 adopts 1650Ω impedance. |
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|
S091-1 |
ON |
Port 9 adopts 600Ω impedance. |
ON |
|
OFF |
Port 9 adopts 1650Ω impedance. |
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|
S091-2 |
ON |
Port 10 adopts 600Ω impedance. |
ON |
|
OFF |
Port 10 adopts 1650Ω impedance. |
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|
S111-1 |
ON |
Port 11 adopts 600Ω impedance. |
ON |
|
OFF |
Port 11 adopts 1650Ω impedance. |
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|
S111-2 |
ON |
Port 12 adopts 600Ω impedance. |
ON |
|
OFF |
Port 12 adopts 1650Ω impedance. |
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|
S131-1 |
ON |
Port 13 adopts 600Ω impedance. |
ON |
|
OFF |
Port 13 adopts 1650Ω impedance. |
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|
S131-2 |
ON |
Port 14 adopts 600Ω impedance. |
ON |
|
OFF |
Port 14 adopts 1650Ω impedance. |
||
|
S151-1 |
ON |
Port 15 adopts 600Ω impedance. |
ON |
|
OFF |
Port 15 adopts 1650Ω impedance. |
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|
S151-2 |
ON |
Port 16 uses 600Ω impedance. |
ON |
|
OFF |
Port 16 adopts 1650Ω impedance. |
This product technical parameters and product characteristics by Shenzhen Guihang Network Technology Co., Ltd (www.opticaltrans.com), reproduced please retain. Huawei SDH Optical Transmission Equipment,SDH Transmission Equipment Sales Tel: 18529092692 Welcome to call us!
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