We have an older TA 5000 system and we have the 1187010G2 SCM card, and the 1187020E1 Switch 2GE cards. It seems like the 1187101E1 32 port ADSL card is too current for our older hardware. Can anyone help me nail down the right SCM or Switch Module needed to support the newer 32 port cards? Also, if there are any chassis/backplane issues... that would be good info. Thank you!