Mitel SX50 Main Control Card II
- Slides in the back of the card
file forming a backplane for all the peripheral cards. Provides DTMF receivers,
central processing unit, RS 232 Interface memory module interface, attendant
console interface. System Control with built in
Music On Hold interface.

- Slides in the back of the card
file forming a backplane for all the peripheral cards.
- Provides DTMF receivers,
central processing unit, RS 232 Interface memory module interface, attendant
console interface.
- System Control with built in
Music On Hold interface