Get ISDN and Video-Conferencing Support Costs Under Control

Loopback's dedicated test facilities provide reliable remote circuit loops for testing video-conferencing and ISDN equipment. Loopback's facilities are video and ISDN bonding capable for up to 23 channels.

Video-Conferencing Test Number
1-900-255-LOOP (900-255-5667)
ISDN Test Number
1-900-267-LOOP (900-267-5667)

Note: Calls cost $1 per minute, per channel.
900 numbers are digital bonding loops
For questions call customer service (314) 645-5550