Vodavi XTS-IP Installation Manual page 24

1-12
Chapter 1 - Introduction
Modem Unit
The Modem Unit (MODU) (Modulator & Demodulator Unit) provides a communication method
interface for remote maintenance and remote PC Admin. It operates in full-duplex,
asynchronous modes at line rates up to 19.2 Kbps.
The Modem Unit provides an asynchronous modem for access to the system database and fault
reporting features from a remote site. The modem may be connected to a pre-selected CO Line
through the system-switching matrix. The MODU port is independent of the SIU standard
RS-232C port, allowing system database access, etc., without the need to interrupt the SMDR
output.
»
The optional MODU is installed on the MPB.
Relay Alarm Unit
The Relay Alarm Unit (RAU) provides three relay contacts and two alarm functions.
Serial Interface Unit
The Serial Interface Unit (SIU) provides an additional two RS-232C (ports 3 & 4) interface circuits
on the MISB. The SIU is useful for SMDR print out and Caller ID. The following is a list of the
system's output:
On-line SMDR
Statistical information
Caller ID input
ACD
»
The optional SIU can be installed on the MISB.
XTS-IP - Installation Manual
Product Description
December 2005