IP-NET, LLC
VQE1 User Manual V1.3
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18-
Parameter
Item
Specification
Adap
tive
Timing Mode
Loop
back
Default :E1timing from remote E1
stream
；
E1 timing comes from local E1
stream
Jitter Buffer
4~12
0ms
Coming packets buffer to eliminate
jitter. Range
：
4~120ms
。
Default 16ms
Enable VLAN
Yes
：
with VLAN label
，
support the
VLAN network with priority to
guarantee E1 QoS
；
(default)No
：
no VLAN label
VLAN ID
Add 4 byte before Ethernet frame
when VLAN is enable. First two bytes
are 0x8100
，
and second two bytes
are VLAN ID
，
which can be set by
customer.
Note
：
1.- The actual output rate should correspond to the transmission bandwidth. If the
transmission bandwidth is smaller than actual uplink rate, E1 errors will occur. So we set
the maximum bandwidth of uplink line. When the uplink is higher than actual E1 rate,
the difference value is Ethernet access rate. When the uplink is lower than actual E1 rate,
the Ethernet rate is 0.
For example
：
the transmission line can provide 6M bi-direction bandwidth. If we use
two E1 channels, the local uplink should be set smaller than 6M.If not, the actual rate
may be higher than the transmission bandwidth. E1 errors may occur.
2.- Bandwidth auto adaptation for E1 depends on the connection of E1. If there is
no signal loss for E1, system will allocate bandwidth for it. When E1 port is free,
bandwidth will be released ,which can be used for local Ethernet access.
3.- The MAC address of VQE1 is fixed in the device. ARP is supported and the remote
end MAC address can be obtained through auto-negotiation. So it is unnecessary to set
the MAC address for the remote end, but IP address is needed.
NOTE
：
Each device should have only one MAC address in the multicast
area!
