Sls Interaction With Specific G450 Features; Direct Inward Dialing In Sls Mode; Multiple Call Appearances In Sls Mode - Avaya G450 Manual

After Teardown is complete, SLS transitions to the Unregistered state and starts searching at
the top of the MGC list for a controller.

SLS interaction with specific G450 features

SLS interacts differently with the various G450 features.

Direct Inward Dialing in SLS mode

Direct Inward Dial (DID) is a service offered by telephone companies that enables callers to dial
directly into an extension on a PBX without the assistance of an operator or automated call
attendant.
Note:
DID is a method of routing calls that applies to both analog and digital (T1/E1)
Note:
lines. However, while the method is typically referred to as DID in the analog
world, it is usually called Dialed Number Identification Service (DNIS) in the digital
world. Despite the difference in names, the concept is the same.
The gateways support DID central office trunk interfaces, and the digit transmission from the
central office is configurable when ordering the service:
Immediate. The DID signaling starts immediately after the central office seizes the analog
●
DID trunk by closing the loop (across tip and ring). In addition, analog DID trunk lines only
support inbound calls. For this reason, Customer Premise Equipment (CPE) utilizing DID
trunk lines for inbound routing may utilize loop-start lines for outbound transmission.
Wink. The DID signaling starts after the gateway's analog trunk interface reverses the
●
battery polarity and sends a "wink" to the central office.
!
WARNING:
An analog two-wire DID trunk line is different from a standard analog loop-start
WARNING:
line. With analog DID trunk lines, the battery (power feed) to the line is supplied
by the gateway's analog trunk interface. With a standard loop-start line, the power
is supplied by the central office, which is why damage can occur from connecting
a loop-start PSTN trunk to the DID port.
The number of sent digits (3-4 typically) and signaling type (Pulse/DTMF) are also configurable
at ordering time.

Multiple call appearances in SLS mode

When a gateway is in SLS mode, three call appearances, each with limitations, are supported:
The first two call appearances are for incoming or outgoing calls. The first call appearance
●
is the default.
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