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Member
Reputation: 264
CS Call Drops (A2 interface abnormal) Rise After BSC cutover TO NEW MSC ATCA
Hi All Expert In CDMA system
Who could help me in this problem
After BSC cutover to a new MSCATCA the call drop rise and the cause was (A2 interface abnormal)
why this happen?
what the solution?
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2013-03-18 06:07 AM
# ADS
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Re: CS Call Drops (A2 interface abnormal) Rise After BSC cutover TO NEW MSC ATCA
Hi, check alarms to start off with. Check if CICs are consistent and match on both MSC and BSC side. Check signaling point routing. You gave very little info but your alarms should tell you a lot.
Sent from my ADR6300
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Member
Reputation: 264
Re: CS Call Drops (A2 interface abnormal) Rise After BSC cutover TO NEW MSC ATCA
Originally Posted by
T_ADD
Hi, check alarms to start off with. Check if CICs are consistent and match on both MSC and BSC side. Check signaling point routing. You gave very little info but your alarms should tell you a lot.
Sent from my ADR6300
About Alarm I didn't see any alarm , CICs and SPCs but i will check it again
About More Information :-
-The drop happen only in BSC border with other BSCs in different MSCs
-drop from BSC1 (MSCATCA1) to BSC2(MSCATCA2) and BSC3(MSCe)
-Incoming and Outgoing HHO success ratio decreased .
-The Reasons of failures in Incoming and Outgoing HHO:-
- Inter-BS Incoming Hard HOs Failures (Other Causes)[Times] Increased
- Inter-BS Outgoing Hard HO Failures (Other causes)[Times] Increased
- Inter-BS Incoming Hard HOs Failures (HO Interrupted by MSC)[Times] decreased
- Inter-BS Outgoing Hard HO Failures (MS Not detected by destination pilot)[Times] decreased
-I already put chart for the problem but didn't know why it didn't appear
A2_DROP.jpg
If could help me with some docs that explain the causes of A2 Drop.
Also why there is a HHO between BSCs of the same MSC vendor.
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Senior Member
Reputation: 386
Re: CS Call Drops (A2 interface abnormal) Rise After BSC cutover TO NEW MSC ATCA
what was the issue ..ay further analysis / resolution ?
Regards
Scorpion-Learning 5G+4G
No Thanks Please ....But few clicks on Reputation always Welcome :-))
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