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Data Sheet
MiTOP-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
• ASIC-based architecture for minimizing processing delay
• Advanced clock distribution mechanism, including synchronous Ethernet (Sync-E
• 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.
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 each
user device, saving on space, power
consumption, cabling, and simplifying
management.
TDM PSEUDOWIRE SPACE BEFORE = 12
UDP/IP, MPLS or MEF. These packets are
transmitted via a 100/1000BaseFx port of
the host device to the PSN. A remote
pseudowire gateway converts the packets
back to TDM traffic.
The following RFC-2495 E1/T1 physical
layer performance statistics are available:
BES, ES, SES and UAS.
Configurable packet size balances
between PSN throughput and delay.
E1 or T1 loss of signal is propagated by
sending an electrical LOS signal to the
100/1000BaseFx port, and is visually
indicated by the LOS LED (red) turning on.
This in turn can automatically turn off the
LAN link. Turning on/off the packet link is
user-configurable (enabled or disabled).
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
TIMING AND SYNCHRONIZATION
•
Network – MPLS, MEF, UDP/IP.
Synchronization between TDM devices is
maintained by deploying advanced clock
distribution mechanisms. The clocking
options are:
MiTOP-E1/T1 is transparent to all signaling
protocols.
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. For IP
networks – the outgoing pseudowire
packets are marked for priority using ToS
(including the DSCP and Diffserv bits).
Pseudowire Performance
High-performance ASIC-based buffering
and forwarding techniques minimize
end-to-end processing delay.
For MPLS networks – the outgoing
pseudowire packets are assigned to a
specific MPLS tunnel and marked for
priority using EXP bits.
The 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 for
transmission over the network. The
addressing scheme of these packets is
OAM and Performance Monitoring
RAD’s TDM PW OAM mechanism verifies
connectivity and prevents pseudowire
configuration mismatch.
The TDM port connects to any standard E1
or T1 device. E1 and T1 interfaces feature:
•
G.703, G.704, framed and unframed
modes
•
SF and ESF framing (T1).
RESILIENCY
•
Internal – the master clock source for
the TDM circuit is the internal oscillator
•
Loopback – the transmit clock for the
TDM circuit is derived from the E1/T1
port receive clock
•
Adaptive – the clock from the TDM
circuit is recovered from the PSN. Clock
recovery conforms to G.823 using
G.8261/G.8262-defined scenarios.
•
Sync-E (Gigabit Ethernet only) –
Synchronous Ethernet timing is
received via PSN and used to create a
MiTOP-E1/T1
SFP-Format TDM Pseudowire Gateway update the field
MANAGEMENT AND SECURITY
locked TDM clock. This ensures both
sides of the network work with the
same clock source.
•
The units can be managed using different
ports and applications:
External – E1/T1 Tx clock is locked to
an external clock source, such as DSL
NTR timing.
•
Jitter and wander of the recovered clock
are maintained at levels that conform to
G.823/G.824 traffic. For adaptive clock
recovery, the recovered clock performance
depends on the packet network
characteristics.
•
Out-of-band via I2C channel via the
SFP edge connector
Inband via the Ethernet port, using a
Web 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.
Application software can be downloaded
to MiTOP-E1/T1 via:
•
SFP-CA unit, using YMODEM protocol
•
Central server, using TFTP.
ARCHITECTURE
Housed in a Small Form Factor Pluggable
(SFP) package, MiTOP-E1/T1 complies with
the Multi-Source Agreement.
MiTOP-E1/T1 is hot-swappable and
features a special release mechanism for
easy extraction from the SFP socket.
OPERATION AND MAINTENANCE
An optional configuration adapter (SFPCA) is available for connecting MiTOPE1/T1 to a PC via a USB 2.0 port. The
configuration adapter is used for
preliminary configuration or software
download.
MONITORING AND DIAGNOSTICS
External and internal loopbacks can be
used to check TDM link connectivity.
Alarms detected during operation are stored
in a buffer holding up to 100 events.
TDM alarms of a connected device are
forwarded to the peer side using the
control word of the PW packet. Alarm
Indication Signals (AIS) are sent to the
connected TDM device if no PW packets
are received or an L-bit Active packet is
received.
Running on power derived from the host
device, it requires no additional power
supply.
Applications
Site A
E1/T1
Switch Site
Edge
Device
GbE/FE
PBX
Switch or Router
with MiTOP Devices
PSTN
STM-1/OC-3,
E1/T1
Metro
Ethernet/MPLS
GbE
ETX-5/IPmux-155
Site B
Edge
Device
E1/T1
Edge
Device
GbE/FE
Switch or Router
with MiTOP Devices
Figure 2. Aggregating TDM Services over PSN
PBX
Data Sheet
MEF: MEF 8
E1 INTERFACE
Compliance
G.824, T1.403, G.703, G.823, T1-231,
AT&T TR-62411, G.775
Number of Ports
1
Data Rate
1.544 Mbps
Jitter Buffer Depth
E1: up to 256 ms
Compliance
G.703, G.704, G.823, G.775
Line Code
B8ZS, AMI
Unframed T1: up to 340 ms
Data Rate
2.048 Mbps
Jitter and Wander Performance
Per AT&T TR-62411, ITU-T G.823,
ITU-T G.824
GENERAL
Specifications
Line Code
HDB3, AMI
Number of PW Connections
1
Framed T1: up to 256 ms
Indicators
LINK (green) – Ethernet link status
Framing
Framed (ESF, D4), unframed
Jitter and Wander Performance
Per ITU-T G.823
LOS (red) – E1/T1 signal status
Line Impedance
100Ω, balanced
Framing
Framed, unframed
Physical
Height: 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)
Cable Type
UTP CAT-5
Line Impedance
120Ω, balanced
Cable Length
Up to 1829m (6000 ft) max, over 22 AWG
wire
Cable Type
UTP CAT-5
Cable Length
Up to 2500m (8202 ft) max, over 22 AWG
wire
Connector
RJ-45
Connector
RJ-45
ETHERNET INTERFACE SPACE BEFORE =
12
Compliance
IEEE 802.3
Number of Ports
1
3.3V, up to 410 mA (Gigabit Ethernet)
Power Consumption
1.1W (Fast Ethernet)
1.35W (Gigabit Ethernet)
Environment
Temperature:
MiTOP-E1/T1/FE:
Ambient: -40 to 65°C (-40 to 149°F)
Case: -40 to 80°C (-40 to 176°F)
Type
100/1000BaseFx
T1 INTERFACE SPACE BEFORE = 12
Power Supply
3.3V, up to 330 mA (Fast Ethernet)
Edge Connector
SFP-based, MSA-compliant
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
PSEUDOWIRE CONNECTIONS SPACE
BEFORE = 12
Standard Compliance
CESoPSN: IETF RFC 5086
SAToP: IETF RFC 4553
Site A
TDM Network
Site B
E1/T1
Ethernet
Switch or Router
with MiTOP Devices
PSN
Ethernet
E1/T1
Switch or Router
with MiTOP Devices
Figure 3. Delivering E1/T1 Services over PSN
TDM Network
Data Sheet
MiTOP-E1/T1
SFP-Format TDM Pseudowire Gateway
RECOMMENDED CONFIGURATIONS
MiTOP-E1/T1/ FE
SFP-format TDM pseudowire gateway,
Fast Ethernet SFP port interface
MiTOP-E1/T1/ GE
SFP-format TDM pseudowire gateway,
10/100/1000BaseT Ethernet user port
SPECIAL CONFIGURATIONS
Please contact your local RAD partner for
additional configuration options
OPTIONAL ACCESSORIES
SFP-CA.2
Configuration adapter for connecting
MiTOP-E1/T1 to a PC
Figure 4. Physical Dimensions
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. 805040
518-100-08/14 (3.00) Specifications are subject to change without prior notice.  1988–2014 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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