CTC Union FRM220-NMC, User Manual, Page: 144 / 182

Appendix A
142
A.7.19 Fiber Port 1 Rate Limiting
The 10/100A provides per port ingress and egress rate limiting. For bandwidth settings, IRL or ingress rate limit
refers to limiting any packets coming into the converter, while ERL or egress rate limit refers to limiting packets
leaving the converter. When rate limiting is applied, ERL will use pause commands (802.3X) when the desired rate
limit is exceeded, while any IRL setting will cause packet to be dropped when the limit is exceeded. This is an
important point when doing the rate limit settings. It is preferable to set ERL at each port for the path that requires
limiting so that flow control can help connected devices cope with the limiting. If IRL is employed, a connected
device which has its packets dropped without flow control, will continue to send packets at its full rate. Also, since
the packets are dropped, the application layer can only deal with the packet loss by timing out.
The ingress rate setting menu. Select rate from 128K to 8M or unlimited.
The same setting rates can be applied to the egress direction.
A.7.20 SFP and D/D Functions
Modern optical SFP transceivers support digital diagnostics monitoring (DDM) functions according to the
industry-standard SFF-8472. This optional feature in SFP is also known as digital optical monitoring (DOM) and
gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input
power, temperature, etc. DDM is not available in every SFP, so if the function says 'No' then the inserted SFP does
not support DD. To view this menu, press "S" from the Fiber Status and Configuration menu.
*************************************************
*** CTC UNION TECHNOLOGIES CO., LTD. ***
*** FRM220-10/100A ver:3.016 ***
*************************************************
<< Local Fiber 1 Status and Configuration >>
Link Status [Up ]
Far End Fault [Off ]
Remote Device Power [Ok ]
OAM Remote Loopback Test [Off ]
OAM Looped [Off ]
<1> :Port Active [Enable ]
<2> :Auto Laser Shutdown [Disable]
<3> :OAM Mode [Active ]
<4> :Remote Loopback Test [Disable]
<5> :QoS Default Port Priority [0]
Ingress Rate Limit:
Select Ingress Rate Limit.
<0> Unlimited <1> 128 Kbps <2> 256 Kbps <3> 512 Kbps
<4> 1 Mbps <5> 2 Mbps <6> 4 Mbps <7> 8 Mbps
<ESC>:Previous Menu.
*************************************************
*** CTC UNION TECHNOLOGIES CO., LTD. ***
*** FRM220-10/100A ver:3.016 ***
*************************************************
<< Local Fiber 1 SFP and D/D Function >>
Vendor Name [CTC UNION ]
Vendor Part Number [SFS-5030-L31(A) ]
Fiber Type [Single]
Tx Wave Length [1310 nm]
Rx Wave Length [1310 nm]
Link Length [0030 Km]
D/D Function [No]
<ESC>:Go to Previous Menu.