The Octel 200/300 Message Server, Smdi, And Centrex Connection - Avaya Octel 200 Installation And Maintenance Manual

Message servers

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Figure 4-1 The Octel 200/300 Message Server, SMDI, and Centrex Connection

Figure 4-1 is a block diagram showing , the Centrex, and the connections between the two. For

integration via SMDI, a serial data link provides information to the Octel 200/300 regarding calls that

have been forwarded to the Octel 200/300 ports. In addition, the Octel

200/300 can activate and deactivate Message Waiting Indication via this link. The data link connects to a

customer-provided modem at the customer's premise.

System Parameter 217 — RS232 INTEGRATION BAUD RATE, can be modified to increase the

baud rate to 2400, 4800, or 9600.

If this parameter is modified, the message server must be restarted before the baud rate is changed.

The following describes Centrex SMDI message waiting indication (MWI)

identification (CPI) operation.

Message Waiting Indication. SMDI tells the Centrex to provide a message waiting indicator in the

form of a stutter tone that can be activated by the Octel 200/300 (for mailboxes with a COS containing

Attribute 9).

When the first new message is received in a mailbox, the Octel 200/300 sends information to the PE to

activate the MWI. If MWI is activated, whenever that station is used to originate a call, stutter dial tone

is heard for approximately two seconds after which regular dial tone is heard. The stutter dial tone

indicates that the mailbox associated with the station has new messages. Stutter dial tone is given each

Octel 200/300

Dedicated 1200 baud

(provided by PE)

PE Equipment

Customer Premise Equipment

called party

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