I found these reports below and the 2nd one is patch related to the problem.
New package 152 FXS introduced.
Sequence of Configuration:
Step Ovl Configuring... Comment
1 11 VPS AG (Agent Greeting) Ports configured as MADNs, with CLS FXSP
ports with CLS= FXSP
2 15 MADNs entered into the Recommend one MADN per VPS AG card CDB under FXS in use (24 ports)
3 11/10 Agent sets with CLS AGRA Activate the feature on a per-set basis
and MOAA or MOAD
(2616 only)
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Problem
SCH1414 due to FXSP class of service. Applies to 25.15, 40, 40B, 02.02 & 03.00
Solution
Get SCH1414 when doing service change, due to FXSP class of service. Patch MPLR16544 corrects this issue.
Firebird Scrambler
Nortel Meridian 1 / Succession and BCM / Norstar Programmer in the UK
Advance knowledge on BCM support