Common integration methods are:
LAN Interface
The LAN link allows the DEFINITY and the INTUITY AUDIX
system to communicate over a private, dedicated LAN or through a customer's
LAN. The LAN link provides the same functionality as a DCIU link, except
the physical connection is different.
Inband
Signaling
Inband integration is possible
on supported switches through the use of Dual-Tone Multiple Frequency
(DTMF) signaling. Strings of DTMF tones are transmitted on the analog
voice channel after the channel connects to answer the call, but before
the voice is cut through. Typically, the string contains the Calling
Line Identification (CLI), the Called Party (CP) Identification, and
the reason for the call (redirection or direct call). Dial strings for
activation and deactivation of Message Waiting Indicators (MWI) are
included in the protocol. Support for MWI update command strings and
DTMF timings (inter-digit timing and end-of-string) is also an essential
element.
Serial Integration
Serial integration is of two types:
- Proprietary
Serial integration requires
an RS-232 interface. The elements of the serial protocol are typically
a superset of those in the inband signaling, with the addition of
a field that describes channel information. When the call is forwarded
to the system, a packet of information is sent through an RS232 standard
serial cable, providing the integration data for the channel the call
arrives on.
- Simplified Message Desk
Interface (SMDI)
SMDI is an integration
protocol that controls the exchange of integration information through
a serial interface. It is an industry standard typically used by central
office (CO) switches.
