17.6. ATRS - Activate network loop check with transit counter 
Feature:
Network loop limit with TRANSIT COUNTER
Function:
The ATRS parameter can be used to activate or deactivate network loop checking with
TRANSIT
COUNTER for S0/S2 tie trunk circuits or interface circuits. This counter prevents
endless
loops in the network. Thresholds are set in every node for incoming trunks or trunk
groups.
The current counter carried in the network protocol is incremented in each transit
node
passed and compared with the administered threshold. When the threshold is reached,
the
connection is cleared and a message appears on the terminal.
The TRANSIT COUNTER check must be activated with COT parameter ATRS and the connection
between the calling and called node may not be prohibited in the node connection matrix.
AMO Interrelationships:
TDCSU: TRACOUNT .... TRANSIT counter threshold
IMPORTANT:
Protocol variants PROTVAR and TRACOUNT must be identical
in all BCGR B channel groups of a trunk.
KNMAT: CONN=E .... Allow connection from ONNO to DNNO
Device types:
Digital tie trunk circuits and interface circuits:
Protocol variants:
CORNV33 - CorNet protocol
CORNV33R - CorNet protocol
ECMA1 - ECMA QSIG V1 protocol
ECMA1R - ECMA QSIG V1 protocol
ECMAV2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ETSI
ECMAV2R - QSIG ETSI ETS 300 172 3rd. with SS 2nd.
PSS1V2 - CorNet-NQ Issue 2.1 Dec. 96 Basic ISO/IEC
PSS1V2R - QSIG ISO ISO/IEC 11572 2nd. with SS