it might work, but I don't think it's supported as listed below.
System Minimum SSC/MSC Compatible with S/W
11C/Cabinet NTDK20CA Rlse 24.25 with 4 –5 cabinets – 25.XX and Succession 3
NTDK20EA Main cabinet when using IP Expansion and …
NTDK20CA For each IP Expansion cabinet
Chassis NTDK97AB
NTDK20EA Main and IP Expansion chassis when using IP Expansion
Succession 1000 NTDK20EA Call Server and Media Gateway
Succession Branch Office NTDK20FA
MG1000T/1000E/
MG1000B/CS1000S NTDK20HA Minimum vintages for the Small System Controller are
• IP Expansion or CS 1000 Systems
Main Cabinet: NTDK20EA-GA SSC + NTDK19BA SSC Memory Upgrade Kit (32Mb)
Each Expansion cabinet: NTDK20AB-GA SSC + NTDK19BA SSC Memory Upgrade Kit (32Mb)
NTDK20HA
• Media Gateway 1000E in CS 1000E systems
NTDK20GA SSC + NTDK19BA SSC Memory Upgrade Kit (32Mb)
NTDK20HA
Software Daughterboard: Loaded with S/W Release Capacity Compatible with S/W
NTSK04AC 22-46 32 Meg 22-46
NTSK04AG 23-47 32 Meg 23-47
NTSK04AK 24-25 40 Meg 24-25
NTDK21AA Blank 32 Meg Rlse 22.08D – 23.47
NTDK81AA Blank 40 Meg Rlse 23.47 – 24.25
NTTK13AA Blank 48 Meg Rlse 24.25 – 25.XX and Succession 3¹
NTTK25AA Blank 48 Meg 25.XX and Succession 3¹
NTTK25BA Blank 48 Meg Release 4.00 / 4.50
All the best
Firebird Scrambler
Meridian 1 / Succession and BCM / Norstar Programmer in the UK
If it's working, then leave it alone!.