Создаю новый Д канал (SL 1), транки. Потом включаю PRI в LD 60 и получаю несколько листов таких сообщений:

DCH: 25 DISABLE INDICATION TIME: 10:18:14
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:14
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:14
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

DCH: 25 DISABLE INDICATION TIME: 10:18:16
REASON - **(00000086 )

Что может быть причиной этой ошибки?
Может ли быть то что на этом месте MSDL был EURO протокол забит?

Попробуй:
LD 96
DIS MSDL ALL

LD 60
DISL 25

LD 96
ENL MSDL X FDL

ENL DCH X FDL
DIS DCH X

ENL DCH Y FDL
DIS DCH Y
...

LD 60
ENLL 25

Если не поможет:
ld 97

CHG SYSM

FDLC ALL F C

далее инициализация (продолжительное время~10 мин.)
...
Если не поможет релоуд, наконец посмотри свичи на MSDL и PRI :)