ISDN / PSTN / GSM Test Line:
We maintain test lines so that our customers can check their codecs by calling in and although it is not guaranteed to be connected and should not be relied upon, if you call us, we can normally connect the correct device.

Vortex TEST LINE:
+44-(0)20-8579 0822

This is an ISDN line with PSTN extensions which can be connected to the following audio codecs:

• POTS/PSTN: ACCESS-R for PSTN/POTS
• GSM: Matrix-R
• ISDN G.722: Matrix-R
• ISDN G.722 Turbo: Matrix-R
• ISDN Layer-III: Matrix-R

Please telephone using our Technical Support Number +44-(0)20-8579 2743 to check for availability and compatibility.

Comrex also maintains the following test numbers:
POTS/PSTN: +1-978-784-1700
GSM: +1-978-784-1796
ISDN: +1-978-772-9404

WRZ Boston normally has a POTS/PSTN codec on line:
POTS/PSTN: +1-617-783-5951

BT Loopback:
0800-675230

ACCESS-IP AUDIO CODECS:
Vortex London UK: 81.149.138.150 - normally a music radio station
Comrex Devens USA: 70.22.155.131 - normally voice
Comrex Devens USA: 70.22.155.132

It's easy to reach Vortex Communications, by road and by public transport...

By Road

From the M40 or M1, take the A406 North Circular Road southbound from Hanger Lane Gyratory System to the junction with the A4020 Uxbridge Road, and turn right.

From the A4 or M4, leave the M4 at junction 2 and join the A4, then take the A406 northbound from Chiswick Roundabout to the junction with the A4020 Uxbridge Road, and turn left.

From the M3, continue towards London on the A316 Chertsey Road to the Quadrant Roundabout at Richmond, take the first exit (A307 Kew Road) and follow directions for the A406 North Circular Road, which starts at Chiswick Roundabout. Follow the A406 to the junction with the A4020 Uxbridge Road, and turn left.

Then, take the first turning left (alongside the Common) and the first turning right (The Grove). Cross a junction and our offices are just past the next turning on the right.

By Rail

If you're coming by public transport, we are 5 minutes walk from Ealing Broadway, which is served by BR from Paddington, Heathrow, Reading and Oxford, and the Central and District Lines. Turn left out of the station entrance, left when you meet the main road, then first right into Windsor Road. Turn first right again into The Grove, and you'll find the office 50yds along on the right.

Vortex has exhibited at every IBC since 1987 and will be exhibiting again at IBC 2010 in Amsterdam, Holland from 10th-14th September. You will find us in our usual spot - in HALL 11 just inside the doors and in the corner. At the top of the escalators to Halls 9, 10, 11 at the entrance to IBC, turn left then left again.

For more information on the exhibition, including details of exhibits and attendees, click here to access the IBC website.

Vortex products will be on display at the 2010 NAB Show from 12-15 April. Do head over to booth C1920 where our colleagues at Comrex will be pleased to help you.

For more information on the exhibition from the NAB Show website, click here.