NEC Univerge sv8500 Manual page 1199

If an access list is applied to the network, looking into all the communication flows, classify the priorities to
make the network effective. The throughput will become low if the settings is inappropriate. The following is
an example:
PRIORIY
1 (High)
2
3
4
5
6 (Low)
• Check the availability if MG-PRI/PRA is connected to the following equipment by tandem connection.
CONNECTING EQUIPMENT
MC Note 1
COT Note 2
LDT Note 2
4W ODT
PRI/PRA/BRI
EC enabled
TDM64K
EC disabled
EC enabled
TDM32K
EC disabled
TDM Less Than 32K
- : Not guaranteed √ : Available
Tandem here stands for a connection that is established over multiple networks such as shown in the fol-
Note 1:
lowing figure.
Network Control Packet, ICMP, etc.
Console Control
VPN Authentication, H323, etc.
RTP
FTP, HTTP, etc
Other packets
Tandem Connection Availability
AVAIL-
ABILITY
Not recommended because
−
-Voice quality may be degraded due to multiple conversion.
-Delay may be increased due to excessive jitter buffer insertion.
Voice speech and FAX relay are available. However, DTMF relay is not
−
guaranteed. (Input level can be lower than minimum DTMF detection
level -27.0 dBm because of line loss at public network side.)
Design your private network so that DTMF input level at MG-PRI/PRA
√
may be larger than -27.0 dBm. If not DTMF relay is not guaranteed.
√
√
√
−
√
−
Not recommended because voice quality may be degraded due to data
−
conversion.
VOL.2-946
PACKET KIND
DESCRIPTION
MG-PRI/PRA