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See the product page >Data SheetMiTOP-E1/T1
SFP-Format TDM Pseudowire Gateway• TDM circuit emulation over a packet-switched network (PSN) with CESoPSN (RFC 5086)
and SAToP (RFC 4553) payload encapsulation• 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-E1/T1 is a TDM pseudowire (PW)
access gateway extending TDM-based
services over packet-switched networks.

Legacy over PSN
solution fortransmitting E1/T1
streams overpacket-switched
networks

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-E1/T1 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 E1/T1 streams
over packet switched networks. The
device converts the data stream from its
user E1/T1 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 TDM traffic.

Configurable packet size balances
between PSN throughput and delay.
Large configurable jitter buffer per each
PW connection compensates for the delay
variation introduced by the PSN.
The gateway supports the following
encapsulation methods:•Payload – CESoPSN and SAToP•Network – MPLS, MEF, UDP/IP.

SFP ENCLOSURE
Housed in a Small Form Factor Pluggable(SFP) package, MiTOP-E1/T1 complies with
the Multi-Source Agreement.
Running on power derived from the hostdevice, it requires no additional power
supply.
MiTOP-E1/T1 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 adedicated VLAN ID according to 802.1Qand marked for priority using 802.1p bits.

High-performance ASIC-based bufferingand forwarding techniques minimize
end-to-end processing delay.

The Access CompanyMiTOP-E1/T1
SFP-Format TDM Pseudowire Gateway

For IP networks – the outgoing pseudowire
packets are marked for priority using ToS(including the DSCP and Diffserv bits).

TDM INTERFACEFor MPLS networks – the outgoing
pseudowire packets are assigned to a
specific MPLS tunnel and marked forpriority using EXP bits.

E1 and T1 interfaces feature:TIMING
Synchronization between TDM devices ismaintained by deploying advanced clock
distribution mechanisms. The clocking
options are:

The TDM port connects to any standard E1or T1 device.
•G.703, G.704, framed and unframedmodes•

SF and ESF framing (T1).

MiTOP-E1/T1 is transparent to all signaling
protocols.
FAULT PROPAGATION•Internal – the master clock source for
the TDM circuit is the internal oscillator•

Loopback – the transmit clock for theTDM circuit is derived from the E1/T1
port receive clock

E1 or T1 loss of 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).

Adaptive – the clock from the TDM
circuit is recovered from the PSN.

MANAGEMENTClock recovery conforms to G.823
using G.8261/G.8262-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.

The units can be managed using different
ports and applications:•Out-of-band via I2C channel (of theSFP edge connector)•Inband via the Ethernet port, using aWeb browser.

To facilitate integration of a new device
into an IP network, if no IP address has
been manually configured, MiTOP-E1/T1
automatically requests one from the DHCP
server upon booting.
Management traffic can run over a
dedicated VLAN.

Figure 1. Aggregating TDM Services over PSN

Application software can be downloaded
to MiTOP-E1/T1 via:
•SFP-CA unit, using YMODEM protocol•Central server, using TFTP.

OAM AND PERFORMANCE MONITORING
RAD’s TDM PW OAM mechanism verifies
connectivity and prevents pseudowire
configuration mismatch.
The following RFC-2495 E1/T1 physicallayer performance statistics are available:
BES, ES, SES and UAS.
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.
CONFIGURATION ADAPTER
An optional configuration adapter isavailable for connecting MiTOP-E1/T1 to a
PC via a USB 2.0 port.
The configuration adapter is used forpreliminary configuration or software
download.

Data SheetSpecifications

Framing
Framed, unframed

E1 INTERFACE

Line Impedance
120Ω, balanced

Number of Ports
1ComplianceG.703, G.704, G.823, G.775
Data Rate
2.048 Mbps
Line CodeHDB3, AMI

T1 INTERFACE
Number of Ports
1

Cable TypeUTP CAT-5

ComplianceG.824, T1.403, G.703, G.823, T1-231,
AT&T TR-62411, G.775

Cable Length (max, 22 AWG wire)
Up to 2500m (8202 ft)

Data Rate
1.544 Mbps

Connector
RJ-45

Line Code
B8ZS, AMI

Jitter and Wander Performance
Per ITU-T G.823

Jitter and Wander Performance
Per AT&T TR-62411, ITU-T G.823,
ITU-T G.824
Framing
Framed (ESF, D4), unframedLine Impedance
100Ω, balanced
Cable TypeUTP CAT-5
Cable Length (max, 22 AWG wire)
Up to 1829m (6000 ft)
Connector
RJ-45
ETHERNET INTERFACE
Type
100/1000BaseFxComplianceIEEE 802.3

Figure 2 Physical Dimensions

Edge Connector
SFP-based, MSA-compliant
PSEUDOWIRE CONNECTIONSStandard Compliance
CESoPSN: IETF RFC 5086
SAToP: IETF RFC 4553
MEF: MEF 8
Number of PW Connections
1
Jitter Buffer Depth
E1: up to 256 ms
Unframed T1: up to 340 ms
Framed T1: up to 256 ms

Figure 3 Delivering E1/T1 Services over PSNData SheetMiTOP-E1/T1
SFP-Format TDM Pseudowire Gateway

Power Supply
3.3V, up to 330 mA (Fast Ethernet)

Indicators
LINK (green) – Ethernet link status

3.3V, up to 410 mA (Gigabit Ethernet)

LOS (red) – E1/T1 signal status
TimingInternal, loopback, adaptive or Sync-E

Power Consumption
1.1W (Fast Ethernet)
1.35W (Gigabit Ethernet)
Environment
Temperature:
MiTOP-E1/T1/FE:
Ambient: -40 to 65°C (-40 to 1491°F)
Case: -40 to 80°C (-40 to 176°F)

PhysicalHeight: 12.4 mm (0.49 in)Width: 14.0 mm (0.55 in)
Depth: 74.1 mm (2.91 in)
Weight: 30.0 g (1.0 oz)

Ordering
MITOP-E1T1/+Legend+ PSN interface:FE
Fast Ethernet
GE
Gigabit Ethernet
OPTIONAL ACCESSORIESSFP-CA
Configuration adapter for connecting
MiTOP-E1/T1 to a PC

MiTOP-E1/T1/GE:
Ambient: -40 to 60°C (-40 to 140°F)
Case: -40 to 75°C (-40 to 167°F)
Humidity: Up to 90%, non–condensing
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

11

Payload encapsulation

CESoPSN, SAToP

SAToP

Jitter buffer size (msec)

Up to 256 (E1, framed T1)

Up to 60 (E3)

Up to 340 (unframed T1)

Up to 45 (T3)

Features

Figure 4. 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, USA
Tel. 201-5291100
Toll free 1-800-4447234
Fax 201-5295777
E-mail market@radusa.com

Order this publication by Catalog No. 80379

The Access Company518-100-07/11 (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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