Equipment and Port Configuration High Speed Link (HSL)
HSL Calibration
To achieve optimal throughput, the HSL should be calibrated, enabling the modems to
operate at the optimal rate under the existing environmental conditions, system deployment
technology and SLA requirements. The calibration procedure implements a predefined
template comprised of allocated Modem Profiles.
Prior to HSL calibration communication between the CO and CPE units is not available (neither
EOC nor Ethernet Traffic).
Table 13: About the Calibration
Regarding Modem
Profile templates:
It is recommended to choose from the available Modem Profile templates
You may customize or define your own Modem Profiles according to the
instructions in the chapter 'Modem Profiles (on page 6-1)'.
Regarding the
Calibration process:
The parameters defined in the Actelis enhanced calibration process use only the
modems that provide the optimal performance.
HSL calibration invoked on ML700-O will begin when any one of the assigned to
the HSL modems becomes available.
Modems which are limiting the HSL performance will be automatically removed
(disqualified due to Bad Ratio) from the HSL if at least one of the following
conditions is true:
There must stay not less than two of modems assigned in the HSL in order to
have modem redundancy and higher link resiliency (i.e. ML system will never
switch to a single modem HSL even if this modem’s rate is higher than a sum
of rates on the rest of HSL modems).
The suspected modem limits the overall HSL bandwidth due to the EFM rate
ratio of 1:4 (meaning improved HSL BW is achievable without this modem on
the HSL)
NOTE: In case of modem auto-removal during calibration, a QUALFLT alarm (with QUAL
value BADRATIO) will be generated on the relevant MLP. In case of modem auto-removal
during modem show-time adjustment, a BADRATIO alarm will be generated on the
relevant MLP. In case of modem auto-removal due to quarantine, QUARANTINE alarm
will be generated on the relevant MLP.
Prior to calibrating
the system, obtain the
following information:
Modem's Minimal and Maximal Data Rate
Required Modem Quality (e.g. SNR margin)
Required transmission technology and profile (e.g. VDSL2 Profile B8-7), multiple
transmission technologies may be provided.
See Modem Profiles (on page 6-1) section for additional information
Keep in mind the
following criteria
when specifying
calibration
parameters:
Calibration parameters should be specified in accordance with the Service Level
Agreement (SLA).
Required SNR margin should be in accordance with customer’s DSL installation
guidelines.
To Next Page
Loading...