Issue with Link in fortinet Switch 2048FS and Cisco CBS 350

I have an issue with Fortiswitches 2048 and a Cisco CBS 350 switch. I had in the Fortinet SFP Finisar and in the Cisco i had a multimode SFP Cisco. The link of the two switches is down and i don’t know why. I replaced the Finisar module with Cisco and the result was the same. Also, i changed the speed from Fortiswitch to 1000 and i didn’t see any change.Inside of the interface of Cisco , there isn’t choice for auto negotiation. The config is trunk with specific vlan and native another vlan from 1. Also, i change the STP to RSTP without any result and i don’t believe the problem was with spanning tree because the the issue is in Layer 1 and not Layer 2. The output of the tranceiver of finisar in Fortiswitch is the below:

Status
OK
Temperature
27.109375 C
Voltage
3.319000005722046 volts
Options
0x000F: TX_DISABLE, TX_FAULT, RX_LOSS, TX_POWER_LEVEL1
Options Status
0x0008: TX_POWER_LEVEL1
Alarm Flags
0x0000
Warning Flags
0x0000
Laser Bias
5.624000072479248 mAmps
Transmit Power
-4.974363327026367 dBm
Receive Power
-6.571826934814453 dBm

FS-2048F-01 # diagnose switch modules state-machine Cisco
DMI Status
----------------------------------
monitor_interval 10 minutes
next_monitor_in 3:07
dmi_trace 0
alarm_trap_enabled 0
num_ports 58
mod_pres 0x0200000000902000
mod_rxlos 0x0100FFFFFF6FDFFF
state_runs 567515
state_transitions 514
Module Summary | | Alarm - Warning Flags |
DMI | Module |Temp | Vcc |TxBia|TxPwr|RxPwr|
port | state A | state B | -IC | Type | State |Hi|Lo|Hi|Lo|Hi|Lo|Hi|Lo|Hi|Lo|
-----------------------------------------------------------------------------------
1 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
2 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
3 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
4 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
5 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
6 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
7 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
8 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
9 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
10 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
11 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
12 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
13 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
14 | INSERTED | INSERTED | 0-0 | SFP |INSERT |..|..|..|..|..|..|..|..|..|..|
15 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
16 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
17 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
18 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
19 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
20 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
21 | INSERTED | INSERTED | 1-1 | SFP |INSERT |..|..|..|..|..|..|..|..|..|..|
22 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
23 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
24 | INSERTED | INSERTED | 0-0 | SFP |INSERT |..|..|..|..|..|..|..|..|..|..|
25 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
26 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
27 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
28 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
29 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
30 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
31 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
32 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
33 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
34 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
35 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
36 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
37 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
38 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
39 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
40 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
41 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
42 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
43 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
44 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
45 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
46 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
47 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
48 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
49 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
50 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
51 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
52 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
53 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
54 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
55 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
56 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
57 | EMPTY | EMPTY | 0-0 | NONE |EMPTY |..|..|..|..|..|..|..|..|..|..|
58 | INSERTED | INSERTED | 0-0 | SFP |INSERT |..|..|..|..|..|..|..|..|..|.

Meanwhile, i see the link of the Fortiswitch up but in the Cisco switch is down. I changed the Cisco SFP from the cisco switch to electrical SFP and the link worked. So i believe the issue is with SFP and maybe i must try to change the Cisco with Finisar SFP. 

Any idea for this specific case?