Modem Swap keeping old SIM

Sometimes a modem will be swapped while re-using the original SIM card from the unit. In this case, the new modem will come without a SIM card in it.

Re-using the SIM card does not work in all cases, only re-use SIM in a new modem if instructed by EMIT.

DCT

Unplug the plugs from the back of the DCT and remove back DCT cover (4 corner screws). The DCT can remain in the panel.

Locate the modem in the upper-left corner.

Continue in the section "Modem Swap" below

EDR

Loosen the three screws on an end cap of the EDR. This should allow the cover to be removed.

 Cover removed

 Modem Swap

• Remove antenna connector shown in red circle above (may be covered in RTV). The connector will pull directly up.

• Remove two screws at location of orange arrows above.
• Remove the modem module itself. It will pull directly up
• Remove old SIM card. Remove tape over card at pink arrow below and push in to pop out card

• If the sim card will not pop out from pushing inward, use a small pick or similar to gently push the sim card out from the 3 holes



Sim card removed

• Put the SIM card into the new modem
• Insert new modem carefully into board, pushing down until seated all the way
• Re attach antenna connection
• Add rtv around antenna connection to keep it from coming off

At this point, the DCT or EDR can be re-assembled and tested.