Table of Contents
Advertisement
4.1
CENTREX SMDI OPERATION
SMDI (Simplified Message Desk Interface), and SMSI (Simplified Message Service Interface) are
optional services available on some Centrex systems.
the Octel 200/300t message server on the customer's premises. This connection is in the form of a 1200
baud serial data link.
Calls to unanswered or busy Centrex lines are forwarded via Centrex call forwarding to the Octel 200/300
multiline hunt group. The SMDI/SMSI feature provides the Octel 200/300 with the number of the
forwarded Centrex line and the condition upon which it was forwarded.
The Centrex must be equipped with Simplified Message Desk Interface (SMDI) or Simplified Message
Service Interface (SMSI) for message waiting indication (MWI) and called party identification (CPI) to
operate.
This chapter refers to SMDI, but also applies to SMSI.
.
As of this publication date, SMDI is available on the AT&T 1AESS, the Northern Telecom
SL-100, and the Northern Telecom DMS 100 public exchange (PE) switches. SMSI is available on
the AT&T 5ESS. Even if the switch is a 1AESS, 5ESS, SL-100 or DMS 100, SMDI or SMSI may
not be available at a particular location. Inquire with the RBOC to see if SMDI/SMSI is available
and at what cost. The RBOC may require the stations associated with the SMDI/SMSI link (the
Octel 200/300 ports) to be in a UCD group. In addition, there is an installation charge associated
with the UCD feature and a one-time charge associated with each station in a UCD group. There is
also a small monthly charge for the UCD.
Fujitsu Focus 9600 PBXs also use the SMDI protocol.
Intecom IBX and Telari PBXs use a protocol similar to SMDI. Since these PBXs send call records with
ASCII periods (.) preceding the station number, use the PREFIX DIGITS Table to remove the leading
ASCII periods.
*
As stated in the Bell Communications Research Technical Reference TR-TSY-000283: "The word simplified
as used to describe this feature, does not imply that there is an alternate feature that is more complex or
comprehensive. It is only used to emphasize the simplicity of the design."
PB60019-01
Centrex SMDI/SMSI Adaptive Integration
They provide a connection between Centrex and
*
4-1
Octel 200/300
S.4.1
Advertisement
Chapters
Table of Contents
