Hello Antonio,

The 4900M datasheet from Cisco is a bit unclear on this point, but this is supported!

Below are some show commands from my switch running this setup:

switch#show version
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500e-IPBASEK9-M), Version 12.2(54)SG, RELEASE SOFTWARE (fc3)
 
System image file is "bootflash:cat4500e-ipbasek9-mz.122-54.SG.bin"

cisco WS-C4900M (MPC8548) processor (revision 2) with 524288K bytes of memory.
Processor board ID JAE1435003D

switch#show inventory
NAME: "Switch System", DESCR: "Cisco Systems, Inc. WS-C4900M 3 slot switch "
PID: MIDPLANE          , VID:      , SN: JAE1435003D

NAME: "Linecard(slot 1)", DESCR: "4900M 10GE (X2) with 8 10GE X2 ports"
PID: WS-C4900M         , VID: V07  , SN: JAE14380OUU

NAME: "Converter 1/3", DESCR: "Converter Module"
PID: CVR-X2-SFP10G     , VID: V02  , SN: FOC14363RL7

NAME: "TenGigabitEthernet1/3", DESCR: "SFP-10Gbase-SR"
PID: SFP-10G-SR        , VID: V02  , SN: AGD142960V6

switch# show interface Te1/3 status

Port      Name               Status       Vlan       Duplex  Speed Type
Te1/3                        connected    1            full    10G 10GBase-SR
switch#

Notice that both de CVR-X2-SFP10G and the SFTP-10G-SR are installed on interface Te1/3.

Best regards,

Siebe