When you want to conduct a video conference but do not have the equipment in the office to handle it, dont worry because there are places that offer their video conferencing services to those who need it.
You can check out a number of hotels or in universities that are near your office is. Given that video conferencing is one of the trends these days, most of them make sure that they use state of the art equipment and tools so you get value for your money.
Some of these include the use of multiple ISDN lines instead of just one as this improves the audio and visual quality.
When you are looking for a video conferencing service, find out what are their operating hours as some are open only during the day while there are others that offer this 24/7. Naturally how much they charge is also important because you dont want to spend too much the first time you are trying it.
If you like the venue and the service they provided, you can probably ask for a discount as you will become a regular here. You could get lucky and get 25% to 50% the regular rate they offer but again, this can only happen if you are happy with your first experience with them....