I'm assuming that the objective is to extend the two analog FXO telco lines to the remote side over the SIP trunk.
On the FXO side, configure three trunks. One for each FXO and one SIP trunk to the other 6355. The FXO analog trunks should look like this:
voice trunk T01 type analog supervision loop-start
description "fxo-0/1-trunk"
no reject-external
trunk-number 5550101 ! <<< Local DID of this FXO (can be 10-digits if you want)
connect fxo 0/1
Second FXO trunk is similar but use FXO 0/2 and trunk T02
The SIP trunk should look like this:
voice trunk T10 type sip
description “Trunk to FXS side”
sip-server primary 192.168.0.2 ! <<< IP of other 6355
Now create a grouped-trunk to the other side:
voice grouped-trunk SIP-TG
trunk T10
accept 5550101 cost 0 ! <<< Match trunk-number of FXO 0/1
accept 5550102 cost 0 ! <<< Match trunk-number of FXO 0/2
And a grouped trunk for the analog lines:
voice grouped-trunk FXO-TG
trunk T01
trunk T02
accept $ cost 0
If it is important that originating calls from the remote handsets outbound to the PSTN use the matching outgoing FXO lines, use SABR to restrict access to the appropriate FXO trunk based on the remote FXS users' ANI.
