Chapter 2: Card Installation
Connecting Timing Cables
The timing port allows up to three TE800 Series cards to share the same
sync (timing) source from the T1 line provider, or provide a consistent
sync source across multiple cards. This is a useful feature for fax modes
and some voice applications to prevent corruption due to timing slips on
the second, or third cards.
To utilize this feature, daisy-chain the P3 connector between each card
using the Digium 3-position, 10-pin timing cable. See Figure 8 on page 28
for an example.
Note: Certain previous model Digium products use a Legacy Timing
Port instead of the Differential Timing Port (P3 connector). If a card is
installed that has only a Legacy Timing Port, daisy-chain the P4
connector between each card using the Digium 4-position timing
cable. See Figure 9 on page 29 for an example.
Enable this feature in the drivers using the
timingcable=1
switch when
the drivers are loaded:
# modprobe wct4xxp timingcable=1
Note: Do not hook up the Differential Timing Port and Legacy Timing
Port at the same time. Only one can be used at a time.
Digium, Inc.
Page 27
Summary of Contents for TE800 Series
Page 1: ...TE800 Series TE820B TE820 User Manual 601 00019 Rev A3...
Page 15: ...Chapter 1 Overview Figure 2 Sample Channel Bank Application Digium Inc Page 15...
Page 16: ...Chapter 1 Overview Figure 3 Sample IP Phone Application Digium Inc Page 16...
Page 24: ...Chapter 2 Card Installation Span Status LEDs Figure 5 TE820 Digium Inc Page 24...
Page 28: ...Chapter 2 Card Installation Figure 8 Differential Timing Port Example Digium Inc Page 28...
