Crocus SHDSL G703.pdf - FTP Directory Listing
Crocus SHDSL G703.pdf - FTP Directory Listing
Crocus SHDSL G703.pdf - FTP Directory Listing
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94 <strong>Crocus</strong> <strong>SHDSL</strong> G703 Chapter 5<br />
User manual<br />
Step-by-step configuration<br />
5.7.1 Selecting unframed or framed mode<br />
crocusShdslTtRpG703/g703/framing<br />
Use the framing attribute to select between unframed or framed mode:<br />
Default:unframed<br />
Range: framed / auto /<br />
unframed<br />
Value<br />
unframed<br />
framed<br />
Description<br />
In unframed (or transparent) mode, a 2 Mbps data stream is sent transparently<br />
over the line.<br />
The attributes timeSlots and crc4Insertion are of no use in unframed mode.<br />
In framed (G.704 framing) mode and in case of a …<br />
• <strong>Crocus</strong> <strong>SHDSL</strong> G703 1P (1 pair), up to 32 time slots each containing a 64 kbps<br />
data stream can be sent over the line. Each 64 kbps time slot can be enabled<br />
or disabled.<br />
• <strong>Crocus</strong> <strong>SHDSL</strong> G703 2P (2 pair), up to 16 time slots pairs together containing<br />
a 128 kbps data stream can be sent over the line. Each 128 kbps time slot pair<br />
can be enabled or disabled. I.e. you always have to select an even number of<br />
time slots. E.g. 2, 4, 10, etc.<br />
Remark<br />
If you set the framing attribute to framed, then the <strong>Crocus</strong> <strong>SHDSL</strong> G703 always operates<br />
in plesiochronous mode regardless of the setting of the timingMode attribute.<br />
auto<br />
If after the training sequence the chosen line speed is …<br />
• 2 Mbps, then the G703 interface automatically works in unframed mode.<br />
• lower than 2 Mbps, then the G703 interface automatically works in framed<br />
mode. Which timeslots will be used, depends on the line speed and the timeslots<br />
configured in the timeslot attribute:<br />
- If the line speed is lower than the configured timeslots, then the corresponding<br />
number of timeslots starting from the lowest configured will be used.<br />
- If the line speed is higher than or equal to the configured timeslots, only the<br />
configured timeslots will be active.<br />
In all cases the timeslot attribute in the status group reflects the timeslots used.<br />
Important remark<br />
• In case of a <strong>Crocus</strong> <strong>SHDSL</strong> G703 2P (2 pair) version, set the framing attribute<br />
of either the central or remote <strong>Crocus</strong> <strong>SHDSL</strong> G703 to auto, but not of both.<br />
Else the 2 line pairs could train at a different speed which is not allowed.<br />
• The number of selected timeslots must be higher then or equal to the line speed<br />
to have a good configuration.
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