Specifications

7-4
Reference Guide
Model No.
Running Head
WAN Card Descriptions WAN Card
7.2.4 WAN-R Card Description (8014)
The WAN-R card is a dual-T1/E1 card with relays for use in CPU XCON systems with
redundant WAN cards. When placed in slot W4 of a chassis, this card acts as a redundant
(backup) card for up to three standard WAN cards in slots W1, W2, and W3. This arrangement
is known as 1-in-N redundancy, where N is the number of working (primary) WAN cards
supported. If a working WAN card fails, the relay on the WAN-R card in slot W4 will switch
its output to the correct pins on the WAN connector of the associated Interface card in the
system. If the WAN-R card is placed in any other chassis slot, it works like a regular WAN
DUAL card. The WAN-R (8014) card works with CSU module (812) refer to section 7.3.2 on
page 7-15 for more information.
7.2.4.1 Card Jumper/Switch Settings
The WAN-R card doesn’t have any jumpers or switches on its mainboard.
7.2.5 WAN Card with ESF Loopback Description (8015)
The WAN card with ESF Loopback is able to detect ESF data link codewords for line and
payload, activate and deactivate commands. A minimum reception of 10 continuous command
patterns by each channel is required to trigger the loopback detection process, and the
performing of the command. Since all 8 channels (4 WAN cards) are processed by one
processor on the CPU card, simultaneous detection on more than one channel requires more
than 10 repetitions.
The ESF Loopback feature can be used only in a T1 environment.
7.2.5.1 Card Jumper/Switch Settings
The WAN card with ESF Loopback does not have any jumpers or switches on its motherboard.
7.2.6 WAN HDSL Card Description (8020)
The WAN HDSL (8020) card supports two PairGain T1/HDSL modules (821) per card. Refer
to section 7.3.4 on page 7-16 for more information. Each module may be configured as master
or slave. There must be one master and one slave in the circuit. The unit designated as the
master can be accessed to change system parameters and view T1/HDSL system performance
history and current status. The slave can only provide T1/HDSL system performance history
and current status. The slave unit receives configuration parameters from the master unit at the
other end of the loop. The configuration parameters include: Timeout for loopback, DS1 line
code option (e.g. B8ZS(Bipolar Eight Zero Substitution)/AMI (Alternate Mark Inversion))
and DS1 framing format (e.g. SF (Super Frame)/ESF (Extended Super Frame).
The WAN Card
with PairGain T1/HDSL (8020) modules can only be used in a T1 environment.