Inter-Tel AXXESS Manual page 983

CRC Processing
3.94 (E1/PRI Only) The CRC Processing flag is a configuration flag that can be enabled/dis-
abled for each E1 card. The setting for this flag must match the setting for the remote-end E1
signal. When CRC Processing is enabled only at one end of an E1 connection, the E1 signal
with the CRC enabled will never reach the CRC Multiframe synchronization state and will
transmit the RAI signal to the remote end until either the CRC Processing is disabled for that
E1 signal or the CRC Processing is enabled for the remote-end E1 signal.
3.95 This flag enables the transmission of a CRC Multiframe pattern and a CRC-4 value
computed/transmitted for every 16 frames of data. At the same time, the CRC Processing flag
enables the E1 Card to look for this CRC Multiframe pattern and CRC-4 value on the received
E1 signal. When CRC Processing is enabled on both ends of an E1 connection, both ends will
reach the CRC Multiframe synchronization. Then, in this multiframe synchronized state, both
ends will compute a CRC-4 value and transmit it to the other end along with the E1 data. On
the receive ends of the E1 connection, both receivers will then calculate their own CRC-4
value for the received data and if the received and the computed CRC-4 values match, the cor-
responding 16 frames of E1 data are assumed to be have been received with no bit errors.
Line Build-Out
3.96 The LBO attenuation of the T1 trunk connected to the card value is determined by the
distance to the nearest public network T1 repeater. The selections are shown below. (The Auto
option should be used during initial installation. The other settings can be used if the build-out
needs to be adjusted later.) To change the setting, select the current Value and use the drop-
down list box to scroll to the desired setting. Then press
save the change.
•
0 dB (DSX-1)
•
-7.5 dB (this is the best setting for T1/E1/PRI Cards)
•
-15 dB
•
-22.5 dB
•
Auto
ISDN Switch Type
3.97 (Used for PRI-equipped Cards only) The System supports primary-rate B-channels.
•
T1/E1/PRI Cards support AT&T 4ESS Custom, AT&T 5ESS Custom, DMS-100 or
National ISDN2, Private Networking and IP Private Networking.
•
E1/PRI Card supports Private Networking, PRI NET-5, and IP Private Networking.
3.98 If the card being programmed will be used to connect two nodes in a network, select
Private Networking
box to scroll to the desired setting. Then press
change. If you selected Private Networking as the ISDN Switch Type, you will be prompted to
select the node that will contain the trunks on this card. If you want to change the node later,
use one of the following methods:
Method A
Select the current Value and enter the new value in the text box.
1.
Press
2.
Select
3.
T1, T1/PRI, or E1/PRI Card Configuration and Programming
®
INTER-TEL AXXESS
. To change the setting, select the current Value and use the drop-down list
. A screen appears showing you what is associated with the number.
ENTER
. The new number appears in the field.
OK
®
MANUAL VERSION 11.0 – May 2008
or click on another field to
ENTER
or click on another field to save the
ENTER
Programming
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