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See the product page >Data SheetMiTOP-E3/T3
SFP-Format TDM Pseudowire Gateway• Miniature TDM pseudowire access gateway employing SAToP (RFC 4553) payloadencapsulation• Support for synchronous Ethernet (Sync-E) solutions• ASIC-based architecture for minimizing processing delay• Advanced clock distribution mechanism, and configurable jitter buffer• Comprehensive OAM and performance monitoring

MiTOP-E3/T3 is a TDM pseudowire (PW)
access gateway extending E3/T3 services
over packet-switched networks.

E3/T3 circuit
emulation overpacket-switchednetworks

Housed in a Small Form-Factor Pluggable(SFP) enclosure, it is designed for quick
and simple insertion into any
100/1000BaseFx Ethernet port with an
MSA-compatible socket.
MiTOP-E3/T3 is a simple and cost-effective
alternative to external, standalone
gateways or conversion cards for eachuser device, saving on space, power
consumption, cabling, and simplifying
management.
PSEUDOWIRE PERFORMANCEThe gateway provides a legacy over PSN
solution for transmitting E3/T3 streams
over packet switched networks. Thedevice converts the data stream from its
user E3/T3 ports into packets fortransmission over the network. The
addressing scheme of these packets is
UDP/IP, MPLS or MEF. These packets aretransmitted via a 100/1000BaseFx port of
the host device to the PSN. A remotepseudowire gateway converts the packets
back to E3/T3 traffic.

Configurable packet size balances
between PSN throughput and delay.
A large configurable jitter buffer per each
PW connection compensates for the delay
variation introduced by the PSN.
The gateway employs SAToP payload
encapsulation. On the network side, theunit uses MPLS, MEF and UDP/IP
encapsulation techniques.
SFP ENCLOSURE
Housed in a Small Form Factor Pluggable(SFP) package, MiTOP-E3/T3 complies withthe Multi-Source Agreement.
Running on power derived from the hostdevice, it requires no additional power
supply.
MiTOP-E3/T3 is hot-swappable and featuresa special release mechanism for easy
extraction from the SFP socket.
PSEUDOWIRE QoS/CoS
For Ethernet networks – the outgoing
pseudowire packets are assigned a
dedicated VLAN ID according to 802.1Q
and marked for priority using 802.1p bits.

High-performance ASIC-based bufferingand forwarding techniques are used tominimize end-to-end processing delay.

The Access Company

MiTOP-E3/T3
SFP-Format TDM Pseudowire Gateway

For IP networks – the outgoing pseudowire
packets are marked for priority using ToS(including the DSCP and Diffserv bits).
For MPLS networks – the outgoing
pseudowire packets are assigned to a
specific MPLS tunnel and marked forpriority using EXP bits.
TIMING
Synchronization between TDM devices ismaintained by deploying advanced clock
distribution mechanisms. The clocking
options are:•Internal – the master clock source for
the TDM circuit is the internal oscillator•

Loopback – the transmit clock for theTDM is derived from the E3/T3 port
receive clock•

Adaptive – the clock for the TDM isrecovered from the PSN.
Clock recovery conforms to G.823
using G.8261-defined scenarios.

•Sync-E (Gigabit Ethernet only) –Synchronous Ethernet timing isreceived via PSN and used to create alocked TDM clock. This ensures bothsides of the network work with thesame clock source.

Jitter and wander of the recovered clock
are maintained at levels that conform toG.823/G.824 traffic. For adaptive clock
recovery, the recovered clock performance
depends on the packet network
characteristics.

TDM INTERFACEThe TDM port connects to any standard E3or T3 device.

Application software can be downloaded
to MiTOP-E3/T3 via:•

SFP-CA unit, using YMODEM protocol

E3 and T3 interfaces feature:•

Central server, using TFTP.

•OAM AND PERFORMANCE MONITORING•

HDB3 (E3) and B3ZS, AMI (T3) linecodes
M23, C-bit framing (T3).

MiTOP-E3/T3 is transparent to all signaling
protocols.
FAULT PROPAGATION
Loss of E3 or T3 signal is propagated bysending an electrical LOS signal to the
100/1000BaseFx port, and is visuallyindicated by the LOS LED (red) turning on.
This in turn can automatically turn off theLAN link. Turning on/off the packet link isuser-configurable (enabled or disabled).
MANAGEMENTThe units can be managed using different
ports and applications:RAD’s TDM PW OAM mechanism verifies
connectivity and prevents pseudowire
configuration mismatch.
DIAGNOSTICS
External and internal loopbacks can beused to check TDM link connectivity.
Alarms detected during operation arestored in a buffer holding up to100 events.
TDM alarms of a connected device areforwarded to the peer side using thecontrol word of the PW packet. AlarmIndication Signals (AIS) are sent to theconnected TDM device if no PW packets
are received or an L-bit Active packet isreceived.

•Out-of-band via the I2C channel (ofthe SFP edge connector)

TEMPERATURE-HARDENED SFP•

Inband via the Ethernet port, using aWeb browser.

A temperature-hardened version of thegateway with Fast Ethernet interface isintended for industrial installations.

To facilitate integration of a new device
into an IP network, if no IP address has
been manually configured, MiTOP-E3/T3
automatically requests one from the DHCP
server upon booting.
Management traffic can run over a
dedicated VLAN.

Figure 1 Delivering E3/T3 Services over PSN

CONFIGURATION ADAPTER
An optional configuration adapter isavailable for connecting MiTOP-E3/T3 to a
PC via a USB 2.0 port.
The configuration adapter is used forpreliminary configuration or software
download.

Data SheetSpecifications
E3 INTERFACE
Number of Ports
1Compliance
ITU-T Rec. G.703, G.751, G. 775, G.823,G.832

T3 INTERFACEETHERNET INTERFACE

Number of Ports
1

Type
100/1000BaseFx

ComplianceGR-499-CORE, T1.107, T1.404, G.703,G.704, G.775, G.824

ComplianceIEEE 802.3

Framing
C-bit, M23, unframed

Data Rate
34,368 Mbps

Data Rate
44.736 Mbps

Line Code
HDB3Line CodeB3ZS, AMI

Framing
Framed (G.832, G.751), unframedLine Impedance
75Ω, unbalanced

Line Impedance
75Ω, unbalanced

Transmit Clock
Receive, internal, adaptive

Transmit Clock
Receive, internal, adaptive

Jitter and Wander Performance
Per ITU-T G.823, G.824

Jitter and Wander Performance
Per ITU-T G.823

Cable Length
Up to 275m (900 ft)

Cable Length
Up to 275m (900 ft)

Connector
DIN 1.0/2.3

Connector
DIN 1.0/2.3

Figure 2 Physical Dimensions

Edge Connector
SFP-based, MSA-compliant
PSEUDOWIRE CONNECTIONSStandard Compliance
SAToP: IETF RFC 4553
MEF: MEF 8
Number of PW Connections
1
Jitter Buffer Depth
Up to 60 ms (E3) or 45 ms (T3)

Data SheetMiTOP-E3/T3
SFP-Format TDM Pseudowire GatewayIndicators
LINK (green) – Ethernet link status andactivity
LOS (red) – E3/T3 signal status
TimingInternal, loopback, adaptive or Sync-E
PhysicalHeight: 12.4 mm (0.48 in)
Width: 14.0 mm (0.55 in)
Depth: 79 mm (3.1 in)
Weight: 30.0g (1.0 oz)

Power Consumption
1.3W (Fast Ethernet)
1.55W (Gigabit Ethernet)
Environment
Temperature:
MiTOP-E3/T3/FE:
Ambient: -40 to 55°C (-40 to 131°F)
Case: -40 to 70°C (-40 to 158°F)
MiTOP-E3/T3/GE:
Ambient: -40 to 60°C (-40 to 140°F)
Case: -40 to 75°C (-40 to 167°F)
MiTOP-E3/T3/FE/H:
Ambient: -40 to 65°C (-40 to 149°F)
Case: -40 to 80°C (-40 to 176°F)
Humidity: Up to 90%, non–condensing

Power Supply
3.3V, up to 400 mA (Fast Ethernet)
3.3V, up to 470 mA (Gigabit Ethernet)

Ordering
MITOP-E3T3/+/?

Legend+ PSN interface:FE
Fast Ethernet
GE
Gigabit Ethernet? Enclosure (Default=regular enclosure):
H
Temperature-hardened enclosure(MiTOP-E3/T3/FE units only)
SUPPLIED ACCESSORIES
CBL-1023-BNC
Two 30 cm (11.8 in) DIN 1.0/2.3 to BNC
cable adapters
OPTIONAL ACCESSORIES

Table 1. MiTOP Family Product Comparison
MiTOP-E1/T1(Ver. 2.5)

MiTOP-E3/T3(Ver. 2.5)

TDM interface

E1/T1

E3/T3

Ethernet port

100/1000BaseFx

100/1000BaseFx

Number of PWs

11Payload encapsulation

CESoPSN, SAToP

SAToP

Up to 256 (E1, framed T1)

Up to 60 (E3)

Up to 340 (unframed T1)

Up to 45 (T3)

SFP-CA
Configuration adapter for connecting
MiTOP-E3/T3 to a PC

Features

Jitter buffer size (msec)

Figure 3. SFP-CA Module

International Headquarters
24 Raoul Wallenberg Street
Tel Aviv 69719, Israel
Tel. 972-3-6458181
Fax 972-3-6498250, 6474436
E-mail market@rad.com

www.rad.com

North America Headquarters
900 Corporate Drive
Mahwah, NJ 07430, USATel. 201-5291100
Toll free 1-800-4447234
Fax 201-5295777
E-mail market@radusa.com

Order this publication by Catalog No. 803859

The Access Company

518-101-07/11 (2.5) Specifications are subject to change without prior notice. © 2006–2011 RAD Data Communications Ltd. The RAD name, logo, logotype, and the terms EtherAccess, TDMoIP and TDMoIP Driven,and the product names Optimux and IPmux, are registered trademarks of RAD Data Communications Ltd. All other trademarks are the property of their respective holders.

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