Part 28 About Isdn Modules - Codec Tieline ViA User Manual

144 ViA User Manual v3
3. Tap Menu
4. Tap Start Sending in the confirmation dialog to commence FTP uploads.
5. A progress bar is displayed to show upload progress and a tick appears next to each
successful upload.
28 About ISDN Modules
ISDN stands for Integrated Services Digital Network. The Basic Rate Interface (BRI) of ISDN
consists of 2 bearer (B) channels at 64 kbps each and 1 data (D) channel at 16 kbps, i.e. (2B +D).
This can be provided over a 2 wire facility and the two B channels can be bonded together to form a
single 128kbps channel. The B channel can carry user information such as voice, video or data. The
D channel carries signaling information between a user and the network.
The codec has a single module slot supporting 2 B channels using the ViA USA ISDN module. This
delivers high quality mono or stereo audio over a single B channel using the Tieline Music
algorithm. If you have 2 B channels you can use one as a standby link, or configure higher
on the FTP Upload screen and then tap Send to upload all selected files.
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