Verilink Access Manager 2000 (896-502037-001) Product Manual - Manual (Page 192)

Configuring the T1 Network
5-68 Access Manager 2000 User Manual
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the signal received from the network is looped back to the network
(ESS) as a keep-alive when a loss of signal (LOS) is detected on the
incoming signal from the EQP.
The default setting for this option is YES (AIS keep-alive).
This option determines the mode of operation of the local BER alarm.
When this option is set to
NO (default setting), the alarm indicator on the
CSU clears when the alarm condition clears.
If this option is set to YES , the local alarm indicator stays on after the
condition clears, until the alarm cutoff (ACO) button is pressed.
If the ACO button is pressed while the alarm condition still exists, the
ACO LED and function activate, but the alarm LED remains lit. When the
alarm condition clears, the alarm clears and the ACO LED goes off.
When this option is enabled ( YES ), it allows automatic transmission of
Performance Report Messages (PRMs) defined by ANSI T1.403-1989.
The PRM transmits the last four seconds of performance data every
second on the ESF Data Link for use by Telco monitoring equipment.
Enable this option only when the use of PRMs is required. The default
setting is
NO .
The Encode option controls the transmit direction to the NET, and the
Decode option controls the receive direction from the NET. These
options are both defaulted to NO , which selects AMI line coding.
To select B8ZS coding on the NET, set both options to YES . These two
options are combined in the 4016 List 1. If you enter YES , then the CSU
encodes the signal to the NET and decodes the signal from the NET.
This option determines whether the CSU circuit element generates a new
CRC-6 code toward the NET or passes the incoming CRC-6 code from
the EQP to the NET.
To pass the incoming CRC-6 bits from the EQP to the network, set this
option to
NO (disable CRC regeneration when the EQP generates the
CRC-6 code).
Enable Alarm
Latch
Enable PRM
Enable Span Side
B8ZS Encode and
Decode
Regenerate CRC to
Span Side