Velocità ADSL e IRC

[`Buu`]

Salve,

ho un problema con la mia "nuova" ADSL.

E' una 1.2mbit aziendale. Scaricando dalla rete, navigando fra le varie pagine sempre che si comporti bene, con dap non scarico oltre i 130k ma, quando scarico da irc, da qualsiasi server, da qualsiasi utente la velocità va a yòyò.. parte alta 130 - 140 poi scende sempre di più sino ad arrivare sui 3k poi risale, questo per tutto il tempo del download... la cosa mi infastidisce abbastanza, ho provato per test a fare da shell dei ping a qualche sito pubblico e con tutti (ne google e libero fra i tanti) si comporta così:

Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=189ms TTL=241
Reply from 66.102.9.104: bytes=32 time=201ms TTL=241
Reply from 66.102.9.104: bytes=32 time=212ms TTL=241
Request timed out.
Request timed out.
Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=191ms TTL=241
Reply from 66.102.9.104: bytes=32 time=208ms TTL=241
Reply from 66.102.9.104: bytes=32 time=216ms TTL=241
Request timed out.
Request timed out.
Request timed out.
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=48ms TTL=241
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=49ms TTL=241
Reply from 66.102.9.104: bytes=32 time=50ms TTL=241
Reply from 66.102.9.104: bytes=32 time=201ms TTL=241
Reply from 66.102.9.104: bytes=32 time=259ms TTL=241
Request timed out.

Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=134ms TTL=117
Reply from 195.210.91.83: bytes=32 time=16ms TTL=117
Request timed out.
Request timed out.
Request timed out.
Reply from 195.210.91.83: bytes=32 time=16ms TTL=117
Reply from 195.210.91.83: bytes=32 time=16ms TTL=117
Reply from 195.210.91.83: bytes=32 time=16ms TTL=117
Request timed out.
Reply from 195.210.91.83: bytes=32 time=16ms TTL=117
Reply from 195.210.91.83: bytes=32 time=145ms TTL=117
Reply from 195.210.91.83: bytes=32 time=393ms TTL=117
Request timed out.
Reply from 195.210.91.83: bytes=32 time=19ms TTL=117
Reply from 195.210.91.83: bytes=32 time=20ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=17ms TTL=117
Reply from 195.210.91.83: bytes=32 time=18ms TTL=117
Reply from 195.210.91.83: bytes=32 time=18ms TTL=117
Request timed out.
Reply from 195.210.91.83: bytes=32 time=14ms TTL=117
Reply from 195.210.91.83: bytes=32 time=14ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=15ms TTL=117
Reply from 195.210.91.83: bytes=32 time=172ms TTL=117
Reply from 195.210.91.83: bytes=32 time=750ms TTL=117
Request timed out.
Request timed out.

Ora non capisco se:

1) le 2 cose sono collegate o è un caso
2) è "colpa" del provider
3) è "colpa" della Telecom che ha messo la linea (solo dati perchè non ho il telefono)
4) è colpa del router (Zyxel ADSL Prestige 650r)
5) è colpa del s.o. (Windows XP Professional eng)

help!

tnx

[`Buu`]

in realtà credo che questa cosa la faccia con tutto, guardate il grafico di un upload (l'altra persona aveva la banda libera) ... può dipendere del router? .....