Problems across our organisation

hi all,

 

newbie here go easy on me...

 

one of our teams @ work receiving training 3rd party company delivers material via adobe connect webinars.  having great difficulty in receiving them, multiple users having webinar load, play few seconds (always less 10, 3 seconds) freeze.  after 30 seconds in looks “paused” , main video feed shows black box , presentation slides disappear. 

 

all users have @ least 512mb ram (most 1 or 2gb, more); 90% using ie7, ie8; every user has @ least 1.4ghz intel pentium 4 processor (majority have core2duo – have i3/i5). again, 90% on xp, on 7 (all windows os) – running custom, in house build.  flash player & connect plugins latest available. 

 

we have 2 connections; our main domain enterprise uses proxies connect , users outside of dept. connect using.  connection supports approximately 80 users @ our head office & 100meg leased line.  have standard adsl connection used wireless lan – accessible staff.

 

some pcs can connect , watch webinars fine either on lan or wireless.  others seems work on wireless, others works on lan.  final few doesn’t work on either.

 

the wlan has no access/distribution layer switches behind access point; literally copper pair filter, router – i.e. resembles residential network. i.e. there no proxies, firewalls, traffic policing or other forms of qos.  2mb connection & when tested done 1 machine @ time.

 

can suggest why maybe happening?  fault looks buffering video – i.e. frozen picture , loading circle.  likelihood of being issue @ hosts end?  there known errors should aware of?

 

thanks in advance replies

has no body ever come across this?  no suggestions @ all?  starting point?

 

 

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