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Chapter 7. Configuring the Network Port
61200275L1-1 TSU IQ+ User Manual 7-7
equipped with an “Adtran Safety Net” device that is capable of
restoring the PVC which is designated by the DBU DLCI element.
If auto DBU is triggered by port failure, then the DBU Call Order
element determines the order of a dialing list for alternate backup
locations.
DBU on Inactive
This option works in conjunction with the dial backup criteria
option W
ITH
PVC I
NACTIVE
. For the DBU O
N
I
NACTIVE
option to
have an affect on auto DBU operation, the W
ITH
PVC I
NACTIVE
option must be set to E
NABLE
.SeeWith PVC Inactive on page 8-5.
If DBU
ON
I
NACTIVE
is set for E
NABLED
and the PVC designated by
the DLCI element goes to an inactive or unknown state, the TSU
IQ+ will dial the phone number designated by the DBU
PHONE
NUMBER
element in the table entry.
G
ROUP
is a special case in which all PVCs that are part of a group
must be in an inactive or unknown state before the auto DBU
process is triggered. This special case is treated as a port failure in
which the DBU C
ALL
O
RDER
entry applies.
DBU Call Order #
This determines the order in which a list of backup locations will be
dialed. This applies only to auto dial backup processes that are
triggered by port failure. If all DBU Call Order entries are set to
N
ONE
, then the first entry with a DBU phone number will be used.
CIR (Kbps)
Enter the CIR (committed information rate) in kbps for the
corresponding DLCI. The information is provided by your service
provider and must be entered for each PVC.
Range is 0 to 1536.
Seq Num Checking (SEQ #)
Set to E
NABLE
onlyifthereareTSUIQ+sonbothendsofthePVC.
When enabled, the TSU IQ+ tags each frame with a sequence
number which is then used by the remote TSU IQ+ to detect lost