Alerting Tone Characteristics; Block Diagram Of Mca And Meridian Modular Telephones - Nortel Meridian SL-100 Reference Manual

4-2 Performance specifications
length limit (longer lengths are possible, depending on the wire's gauge and
insulation).
The Meridian modular telephones equipped with MCA use a 6-conductor
line cord. Those without the MCA use a 2-conductor line cord.
Figure 4-1 shows a simplified block diagram of the Meridian modular
telephone, Meridian communication adapter (MCA), and integrated services
digital line card (ISDLC) in the MSL-100 system.
Figure 4-1xxx

Block diagram of MCA and Meridian modular telephones

Meridian communication adapter
Receivers
EIA
drivers
RS-232-C
DTE
interface

Alerting tone characteristics

Four alerting tones and a buzz signal are provided for the Meridian modular
telephone series. The system controls the ringing cadence by sending
555-4001-114 Standard 10.02 November 1999
CAUTION
Do not use other vendor line cords
Use only the line cord provided with the Meridian
modular telephone. Using a cord designed for other
digital telephones could result in damage to the cord.
MDAD
µ P
A64
–12V
+5V
+12V
Power supply
Power supply
option cord
Telephone set
MTDC
A44
–5V
µ P
SL-100 system
ISDLC