Comtech EF Data CDM-625 - Manual (Page 154)

CDM-625 Advanced Satellite Modem Revision 15
Front Panel Operation MN-CDM625
5–54
CONFIG: IP  IP Setup  WAN
WAN: Buffer Length = 240ms
Avg Buffer Fill State = 00% ()
On the top line – Use the ▲▼ arrow keys to edit the WAN Buffer Length, and then press ENTER.
The value is configurable from 20ms to 780ms in 20ms increments. Packets are dropped when
the buffer is exceeded.
On the bottom line (read-only) – The percentage of the Average WAN Buffer Fill State displays
across a 4-second duration.
If the optional IP Packet Processor card is installed and enabled, this menu is non-
functional and displays as follows:
WAN: Buffer Length = N/A due to PktP
Avg Buffer Fill State = xx% ()
CONFIG: IP  IP Setup  PerPortCnfg
Per-Port-Config:
Port1 Port2 Port3 Port4 ()
Use the ◄ ► arrow keys to select Port1, Port1, Port1 or Port4, and then press ENTER.
CONFIG: IP  IP Setup  PerPortCnfg  Port#
Port#: Pause=Off NegoSpeed:LinkDwn
Speed=Auto (Auto,100F/H,10F/H) ()
Where # denotes the selected Port.
On the top line – Pause Frame Flow Control is set on a per port basis; use the ▲▼ arrow keys to
set this control as On or Off (default is Off). To turn Pause on for the selected (active) port, you
must meet the following conditions:
1. Tx Data Rate, or IP Info Rate (if Sub-Mux is on), or a data rate calculated based on ModCod0
from the Symbol Rate in ACM, must be at least 128 kbps.
-and-
2. WAN Buffer Length must be large enough, so that Data Rate in kbps x buffer
length / 4096 ≥ 24 .