4.2
IDU Configuration
4.2.1
Modem Configuration
Figure 4.4
Modem configuration
1.
Modem data status –
shows if management CPU was able to read data from
modem;
2.
Modem standard –
allows switching between ETSI and ANSI (FCC) standards,
changing available bandwidths to 3.5/7/14/28/40/56 MHz and 5/10/20/30/40/50
MHz and changing between E1 and T1 channels respectively (command line –
modem standard
<ETSI|ANSI>
);
3.
Bandwidth –
allows choosing between 3.5 and 56 MHz bandwidths available. The
default value is 3.5 MHz. The wider bandwidth you have, the higher will be the
overall link bitrate. The maximum bitrate of 363 Mbps is available using 56 MHz
bandwidth (command line –
modem set
<bandwidth> <min_modulation>
<max_modulation> <strongFEC|weakFEC> <channel mask>
);
4.
Modulation –
allows choosing between 256QAM, 128QAM, 64QAM, 32QAM,
16QAM and 4QAM modulations. The default value is 4QAM. The higher is the
modulation order, the higher is the overall link bitrate, but worse RSL threshold. The
maximum bitrate of 363 Mbps is available using 256QAM modulation (command
line –
modem set
<bandwidth> <min_modulation> <max_modulation>
<strongFEC|weakFEC>
<channel mask>
). See below the explanation for
Adaptive
Coding
and
Modulation
and
FEC
modes;
5.
E1 channels
– allows to choose preferable E1 channels to be used. Each E1 channel
activated detracts 2.048Mbps from Ethernet capacity. By default E1 channels are
turned off (command line –
modem set
<bandwidth> <min_modulation>
<max_modulation> <strongFEC|weakFEC>
<channel mask>
). In order to switch to
T1 channels, modem standard needs to be changed to ANSI (FCC);
6.
By pressing
„Execute configuration”
changes made to the corresponding section
apply only for the local side CFIP PhoeniX. If
„Rollback on”
is selected, configuration
will be reverted in case erroneous configuration changes are applied.
7.
Pressing “Execute for both” applies changes made to the corresponding section
both for local and remote side CFIP PhoeniX link.
Adaptive code and modulation (ACM)
technology allows operators to achieve high-capacity data
transmission over microwave links and improve the link utilization. This reduces both operational and
capital expenditures for maintaining high-capacity links. ACM can maintain the highest link spectral
efficiency possible at any given time in any link condition.
In traditional voice-dominated wireless backhaul transmission networks, service availability levels
of 99.995% are the norm.
However, newer services such as Internet browsing, video streaming and video conferencing can
operate at more relaxed availability levels. With use of QoS prioritizing ACM can allocate the required
CFIP PhoeniX Series TDM/IP Split Mount System Technical Description and Configuration Guide
•
Rev. 1.13
•
© SAF Tehnika JSC 2015
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