MP-1xx SIP
MP-1xx SIP User’s Manual 18 Document #: LTRT-65404
1.4 MP-1xx Features
This section provides a high-level overview of some of the many MP-1xx supported features.
1.4.1 General Features
• Superior, high quality Voice, Data and fax over IP networks.
• Spans a range of 2 to 24 analog ports.
• Supports analog telephone sets or analog PSTN/PBX trunk lines (FXS/FXO).
• Connects to the network via a 10/100 Base-TX Ethernet interface.
• Selectable G.711 or Low Bit Rate (LBR) coders per channel.
• T.38 fax with superior performance (handling a round-trip delay of up to nine seconds).
• Echo Canceler, Jitter Buffer,
Voice Activity Detection (VAD) and Comfort Noise Generation (CNG)
support.
• Web management for easy configuration and installation.
• Simple Network Management Protocol (SNMP) and Syslog support.
• Simple Network Time Protocol (SNTP) support, the time-of-day can be obtained from a
standard SNTP server.
1.4.2 Hardware Features
• MP-124 19-inch, 1 U rugged enclosure provides up to 24 analog FXS ports, using a single
50 pin Telco connector.
• MP-10x compact, rugged enclosure only one-half of a 19-inch rack unit, 1 U high (1.75" or
44.5 mm).
• MP-124 devices: optional AC or DC power supply.
• Lifeline - provides a wired phone connection to PSTN line when there is no power, or the
network fails (applies to MP-10x FXS gateways).
• LEDs on the front and rear panels that provide information on the operating status of the
media gateway and the network interface.
• Restart button on the Front panel that restarts the MP-1xx gateway, and is also used to
restore the MP-1xx parameters to their factory default values.
1.4.3 SIP Features
The MP-1xx SIP gateway complies with the IETF RFC 3261 standard.
• Reliable User Datagram Protocol (UDP) transport, with retransmissions.
• T.38 real time fax (using SIP).
Note: If the remote side includes the fax maximum rate parameter in the Session Description
Protocol (SDP) body of the Invite message, the gateway returns the same rate in the
response SDP.
• Works with Proxy or without Proxy, using an internal routing table.
• Fallback to internal routing table if Proxy is not responding.
• Supports up to four Proxy servers. If the primary Proxy fails, the MP-1xx automatically
switches to a redundant Proxy.
• Supports Proxy server discovery using Domain Name Server (DNS) SRV records.
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