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IPmux-1/1E Installation and Operation Manual Chapter 1 Introduction
Overview 1-7
ISDN BRI
IPmux-1E has 4-ports, S-interface only. Each port can be configured as either NT
or TE (Network/User) by jumper and software; NT or TE is configured per device.
IPmux-1E can be configured to 1, 2, 3 or 4 active ports.
IPmux-1E works in transparent mode (no termination/compression of D channels).
It operates opposite IPmux with E1/T1 and a Megaplex unit as a concentrator in
transparent mode or opposite another IPmux-1E with ISDN BRI ports.
FXS
IPmux-1E has 4 FXS interface ports for POTS connection. A central IPmux unit
with an E1/T1 CAS interface can groom FXS channels from the remote site.
IP
The data stream coming from the E1 or T1 port is converted into IP packets that
are transported over the Fast Ethernet port, and vice versa.
TDM bytes are encapsulated in a UDP frame that runs over IP and over Ethernet.
The number of TDM bytes in an IP frame is configurable for throughput/delay
tradeoff.
Each device has a single IP address (Host IP). A configurable destination IP address
is assigned to the IP packets. IP ToS field support can be configured for IP Level
Priority.
Ethernet User Port
IPmux-1E has an optional user port for user LAN connectivity/access as well as
TDM services connectivity. A transparent bridging mode is supported
(user/network Ethernet port) and a second mode which enables user port rate
limiting.
Ethernet Physical Port
IPmux-1/1E is available with Ethernet ports (user or network port). The Ethernet
network port can be either UTP or fiber. The Ethernet user port is UTP only.
• UTP option – A standard 10/100BaseT half/full duplex port with
auto-negotiation support. If auto-negotiation is disabled, IPmux-1 capabilities
can be configured to 100BaseT – full duplex, 100BaseT – half duplex,
10BaseT – full duplex, or 10BaseT – half-duplex. Half-duplex operation in
IPmux-1 network port is not recommended, because collisions and backoffs
cause large delay variation and may exceed the delay variation buffer
tolerance at the receiving end, causing buffer underflows and errors to occur.
• Fiber option – standard 100BaseF full duplex port (see Table 1-1).
Order from: Cutter Networks
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