Test Setup; Figure 6: 86445-31 2W Fxs Unit Analog Loopback - GE JungleMUX 86445-31 Technical Practice And Installation Manual

Slot Number (use is optional)
Identifies the slot position within the shelf (1 to 15) in which the unit
is located. This information may be utilized on the NMS.

Test Setup

Bantam Jack
May be set for Bridging or Splitting (default).
Bridging mode allows for monitoring of the circuit via bantam jacks
on the unit face plate.
Splitting mode disconnects the drop side of the circuit (upon
insertion of test jack) and allows tones to be injected and measured
for end-to-end or loopback testing.
Loopback
May be set for None (loopback off) or Analog.
feature is used for test/maintenance purposes only.
In Analog loopback mode, the unit internally loops the signal back
towards the far-end unit at the analog side of the CODEC. This
means that a signal transmitted from the far-end will be looped
back to the far-end. This allows to inject a tone from a VF Test Set
connected to the far-end unit and measure the tone received at the
far-end unit. Note that if an external hybrid function cannot be
provided for testing, then an 86444 4W VF unit may be used for
testing purposes.
Figure 6: 86445-31 2W FXS Unit Analog Loopback: (a) with 2W
FXO or 2W FXS unit at far end; (b) with 4W VF unit at far end
Copyright  GE Multilin Inc. 2002
2W FXS 2W FXS
XMT XMT
2W 2W 2W
A/D A/D
2W 2W
VF VF
RCV RCV
D/A D/A
4W 4W 4W
NEAR END NEAR END
2W FXS 2W FXS
XMT XMT
2W 2W 2W
A/D A/D
2W 2W
VF VF
RCV RCV
D/A D/A
4W 4W 4W
NEAR END NEAR END
342-86400-445PS
Issue 4.0
October 2006
Page 31
2W FXO/FXS 2W FXO/FXS
RCV RCV
4W 4W 4W
D/A D/A
XMT XMT
A/D A/D
2W 2W 2W
FAR END FAR END
(a) (a)
4W VF 4W VF
RCV RCV
D/A D/A
XMT XMT
A/D A/D
FAR END FAR END
(b) (b)
The loopback
2W 2W
VF VF
4W 4W
VF VF