Specifications

Base Site Controller
iDEN® System
August 08, 2000 68P81095E55-E 2-23
• Subscriber database local to the switch for fast access during call set-up
• Contains most of the HLR information about the active MS units
• Contains the most recent location information within the coverage area
• Adds/deletes MSs as units roam into or out of, the coverage areas
Short Message
Service
The Short Message Service -Service Center (SMS-SC) will deliver short messages
(up to 140 characters) to a full alpha-numeric display MS. The MS can store up to
16 messages. There is additional storage in the SMS-SC database. These sources of
a short message can include:
• Operator entry of alpha-numeric messages
• Messages from an online message site
• Numeric messages entered using DTMF overdial from a telephone
• Optional voice mail indications from a connected voice mail system
The SMS-SC delivers the short message to the MS. Messages are sent to the MS
when space is available in the MS memory or when a stored message in the MS is
cleared. The MS can receive a message when it is either idle or during an
interconnect call. A MS active in an dispatch call cannot receive a message. If the
MS is unavailable or unable to accept the message, the SMS-SC stores the message
for delivery when it becomes available.
The SMS-SC is optional and requires an MSC. Functions of the SMS-SC include:
• Short Message Service with message acknowledgment
• Short Message delivery when MS is idle or on a Interconnect Call
• Delivery of messages to subscriber through retries
• Delivery of messages across MSC boundaries for roamers
• Optional link to Voice Mail & E-Mail to send a Message Waiting to an MS
• Entry of messages from operator positions
• Entry of messages from dial up devices utilizing the TAP protocol
• Entry of messages from E-mail systems through an Internet interface
Inter-Working
Function
The Inter-Working Function (IWF) performs the data-rate adaptation between the
PSTN and the iDEN system. The IWF provides a modem bank that allows data
transmitted from data devices on an external the network to access MSs and RF
modems. The IWF terminates the PCM digital data format such as Teletype (TTY)
facsimile and dial-up networking (Figure 2-13). Functions of the IWF include:
• Circuit switched data services for the MS
• Data connectivity to TTY devices with Bell 103 compatible modem
• Data modem functions to the PSTN
• Group 3 FAX Modem
• Non-transparent Data Services up to 9600 Baud