AutoQoS and multilink PPP

I'm studying AutoQoS and I'm told that for links which speed is lower than 768 kbps AutoQoS may configure multilink PPP.

No other expanation is given (as usual in many cases with CiscoPress books).

My understanding is that this way packets are fragmented and when sent over the link there is less difference between long packets (FTP data for instance) and voice packets, which by nature are small.

This way big data packets and voice packets are sent over the link in almost equal chunks and the latter are not delay too much when big packets are sent.

Now is this fragmentation a feature of PPP or Multilink-PPP?

I'd think multilink PPP and that's why even on a single link they configure it even though there are not multiple parallel links to benefit from.

May anybody confirm my thoughts or tell if there is a different explanation?



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I think I found a good explanation here:

Reducing Latency and Jitter for Real-Time Traffic Using Multilink PPP

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