Library items tagged:

Products

Anonymous
Thursday, January 19, 2012 - 09:27
Videoconferencing
products
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Contact

Anonymous
Tuesday, January 17, 2012 - 20:33
managed router service
Contact
For all enquiries, including applications to join the Janet Managed Router Service, please contact the Janet Service Desk on 0300 300 2212 or service@ja.net.
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Upgrading your existing bandwidth and Janet router

Anonymous
Tuesday, January 17, 2012 - 20:24
managed router service
upgrade
When a customer requests a connection bandwidth upgrade, unless paid for by a centrally funded programme, the upgrade will be funded by the individual customer. The customer will be expected to meet the costs of the upgrade, and if required, the full costs of a new site router or if upgrading an existing router any additional equipment that may be required.
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Customer-owned routing equipment

Anonymous
Tuesday, January 17, 2012 - 20:21
managed router service
customer-owned equipment
The Managed Router Service can be offered on customer-owned routing equipment, subject to agreement of the Janet Network Engineering Group.  In this situation router maintenance will not be covered by the Managed Router Service  terms and the customer will be responsible for maintaining the router.  Customers should be aware that once Jisc take on the management of the routing equipment the site will no longer have access to make any configuration changes.
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Cost

Anonymous
Tuesday, January 17, 2012 - 20:20
charges
costs
managed router service
The Jisc Managed Router Service (MRS) is available, without charge, for an eligible, funded, organisation’s primary Janet IP connection of up to the bandwidth allowed for within the funding. A charge for MRS applies to the following classes of Janet IP connections:
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Eligibility

Anonymous
Tuesday, January 17, 2012 - 20:12
managed router service
eligibility
All Janet customers are eligible for the service; however it is aimed primarily at FE bodies and may not be suitable for all HEIs. The routers provided can support bandwidths of up to 10Gbit/s and router configuration changes provided by the service are limited to 5 per year. HEIs should look at their requirements carefully before opting for the MRS to ensure it is suitable.
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Conferencing with delayed sound

Anonymous
Tuesday, January 10, 2012 - 16:55
Videoconferencing
introduction
When videoconferencing over ISDN, IP and other networks, although echoes can be reduced to a manageable level delays on the sound or “Latency” remains. This introduces an unnatural element into a videoconference that participants need to be aware of. All participants have to learn to conference within the limitations of the time delay, and so interaction is less spontaneous than with a face to face meeting. As most conferences are voice switched, sharp interjections will cause the conference to switch automatically to that site; this may clip another site’s presentation.
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Echo cancellers

Anonymous
Tuesday, January 10, 2012 - 16:55
Videoconferencing
introduction
To reduce echoes caused by transmission delays, special devices known as “Echo Cancellers” are used. These devices when operating efficiently can almost eliminate all traces of echo during a conference. Room acoustics and microphone positions also affect the level of echo. If a microphone is moved or its sensitivity is altered during the conference, echo could be introduced until the echo canceller has realigned itself to the new environment.
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Delays in the sound (latency)

Anonymous
Tuesday, January 10, 2012 - 16:54
Videoconferencing
introduction
To keep transmission costs to a minimum, the data rate for videoconferencing is generally very low. This means that the vision signals need significant compression to squeeze into the small space available. Compression requires a considerable amount of electronic processing. One penalty to pay for this is the time taken for the vision signals to travel through all the circuitry. The delays are appreciable and can be of the order of 0.25 second. The delays introduced in compressing the sound signals are very much less, as not so much signal processing is needed.
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Dressing for the camera and CODEC

Anonymous
Tuesday, January 10, 2012 - 16:53
Videoconferencing
introduction
dress
Videoconferencing is a form of television so the guidelines for appearing on television are relevant. Because videoconferencing uses a reduced quality network link to keep costs down some other limitations are also introduced. Television cameras can only handle a very limited range of contrast so wear clothes in pastel shades and plain weaves. Strong saturated colours and white shirts are not recommended. Within a videoconference, faces are the focal point, so clothing must not pre-dominate the image. Avoid clothes that are brightly coloured or with a distinctive pattern.
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