Digium, Inc.
Page 22
Chapter 2: Card Installation
Shipment Inspection
The following items are included in shipment of the TE120 Series:
TE120 Series card (TE120P/TE121/TE122)
Identifying Features
Your TE120 Series card has one RJ45 port and two status LEDs. The port
is used for connecting T1, E1, or J1 cables. The two LEDs serve as a
status LED and an amber loop-back LED. The card includes a strap for
selecting either T1 or E1 line mode. See Figure 3 on page 23 to locate
these features.
The TE121 and TE122 cards may also be combined with Digium’s
hardware-based echo canceler, model VPMADT032. See Figure 4 on
page 24 for an example of the TE121 card shown with the echo
cancellation module.
T1/E1 Selection
The T1/E1 mode, in most cases, is set at the distributor before shipment.
You may want to check the setting to be certain it is set for your specific
use. With the jumper off, the span is ready for T1 mode, and with the
jumper on, the span is ready for E1 mode.
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