You are right those modules aren't supported on that line card. You can try the unsupported modules command but it might not work and then your only options is new line card or GLC-SX-MM= modules. Quick question the 7962 IP phone has copper port or do you have the CIS version that is fiber? The unsupported command for third party modules in Cisco switches is
type this first - no errdisable detect cause gbic-invalid Then type this second - service unsupported-transceiver Remove SFP module, shutdown/no shutdown the port, insert back the SFP module.
The 7962 phones we have do have a copper option in addition to fiber (does have an RJ-45 jack on it). We had to move our 7962's off of a 3750-X on which they worked, due to network redesign and just ran into this issue.
So we are pursuing different options from upgrading IOS, to media converters and even the possibility of investing in new phones that are 1000Mb capable (haven't gotten that far into researching that though). The major goal is to get to the least costly solution.
So I really do appreciate your suggestions and we will let you know when we try the unsupported module option and if it's successful.