Alcatel-Lucent omniacces-voip gateway User Manual

Page 2-9

The Cross-Over toggle switch for digital voice daughtercards (VSDs only) can be used to 
correct communication link errors between a daughtercard in the switch and a PBX or keyset 
due to the transmit (TX) and receive (RX) pins of the cable connecting the VoIP daughter-
card and the digital telephony device (PBX or other voice device). This will show up as the 
link LED not turning green (see VSD Front Panel on page 2-7).

If a communication link error occurs between the switch and the PBX or Key Set as such, the 
blue Cross-Over toggle switch, as shown here on the top side of the board, can be flipped to 
a Cross-Over ON or OFF position after shutting down the VoIP switch and removing the 
affected daughtercard. This will swap the transmit and receive connections for the designated 
port. The default toggle position is to the left or OFF position.

Once the toggle switch has been flipped, the card can be reinstalled, and the ports on the 
voice daughtercard reconnected to the PBX or other voice device using either a Straight-
Through or Cross-Over cable (Straight-Through recommended).

♦ Notes ♦

An amber cellophane tape may need to be peeled off 
the top of the Cross-Over toggle switch before the 
toggle switch can be flipped. When the tape is present 
it indicates the toggle switch is set to factory default.

The physical port always has 8 pins, but changes func-
tionally depending on the cable in use. For more infor-
mation on the RJ-45 jacks, see VSD RJ-45 Specifications 
on page 2-11.