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IPmux-24
TDM Pseudowire Access Gateway

TDM circuit emulation• Comprehensive support for pseudowire/circuit emulation standards including
TDMoIP, CESoPSN, SAToP, CESoETH and HDLCoPSN

over packet-switched• Industry-leading adaptive clock recovery mechanism suitable for cellular
backhaul over packet-based networks

networks• Carrier-class/environmentally hardened device• Extensive OAM and performance monitoring capabilities• Three auto-detecting Gigabit or Fast Ethernet SFP- or UTP-based ports, andone, two or four TDM service ports

IPmux®-24 provides legacy services overpacket networks. The device converts thedata stream from its user E1/T1 ports into
packets for transmission over the
network. These packets are transmitted
via the IPmux 24 Ethernet network port to
the PSN. A remote pseudowire device
converts the packets back to their originalformat.

PSEUDOWIRE FUNCTIONALITY
The ASIC-based architecture provides arobust and high performance pseudowire
solution with minimal processing delay.

The Access Company

IPmux-24
TDM Pseudowire Access Gateway

The unit employs various pseudowire
encapsulation methods, including TDMoIP,
CESoPSN, SAToP, CESoETH (MEF 8) andHDLCoPSN.

PSEUDOWIRE TIMINGTDM INTERFACE

End-to-end synchronization between
circuits is maintained by deploying
advanced clock recovery mechanisms.

One, two or four E1 or T1 ports provide
connectivity to any standard E1 or T1
device.

Proper balance between PSN throughput
and delay is achieved via configurable
packet size.

Clock recovery conforms to G.823 andG.824 traffic interface using
G.8261-defined scenarios.

The E1 and T1 interfaces feature:•

Integral LTU/CSU for long haul
applications

A jitter buffer compensates for packet
delay variation (jitter) of up to 180 msec
in the network.

Advanced clock recovery conforms toG.823 synchronization interface using
G.8261-defined scenarios and achieves
16 ppb clock accuracy.

•

G.703 and G.704 framing modes•

CAS and CRC-4 bit generation (E1)•

D4/SF and ESF framing (T1)•

Robbed bit (T1).

PSEUDOWIRE QoS/CoS
Ethernet networks – outgoing pseudowire
packets are assigned a dedicated VLAN ID
according to 802.1q and marked forpriority using 802.1P bits.
IP networks – outgoing pseudowire
packets are marked for priority using
DSCP, ToS, or Diffserv bits.

The system clock ensures a single clock
source for all TDM links. The system clock
uses master and fallback timing sources
for clock redundancy. IPmux-24 also
provides system clock input and output via
an optional external clock port.

MPLS networks – outgoing pseudowire
packets are assigned to a specific MPLS
tunnel and marked for priority using EXP bits.

Figure 1. 2G/3G Cellular Backhaul

Data SheetETHERNET INTERFACE
The following Ethernet ports are available:•

One network port•

One network/user port•

One user port.

The Ethernet ports accept a wide range of
Gigabit and Fast Ethernet SFP-based fiber
optic and electric, as well as built-in UTP
interfaces.
The unit can also be ordered with Fast
Ethernet interfaces only (IPmux-24/FE).
ETHERNET CAPABILITIESIPmux-24 features an internal bridge,
operating in VLAN-aware and
VLAN-unaware modes.
VLAN stacking is used for traffic
separation between different users orservices, by defining a service provider
VLAN ID per customer or service. When
VLAN stacking is used, a service provider
VLAN tag is added to the user traffic andremoved from network traffic. Bothservice provider VLAN ID and service
provider VLAN priority can be defined.

IPmux-24 provides four priority queues foreach port or pseudowire traffic flow. User
traffic can be prioritized according to
VLAN priority, DSCP, IP Precedence or per
port.
Ingress and egress rate can be limited peruser and network port. Rate limitation is
configured per packet type.
ETHERNET RING TOPOLOGIESA G.8032 Layer-2 Ethernet ring is used by
IPmux-24 for traffic protection. This
technology builds a logical ring, defined asa set of IEEE 802.1-compliant bridges, andprotects against link and node failures. To
achieve this, every node in the ring has
two bridge ports connected to adjacentnodes. The ring itself is constructedindependently of the transport technology
used at the server layer. Failures in thering are detected by using Ethernet OAM(Y.1731) continuity check (CC) messages
between adjacent nodes.
In addition, the unit employs Resilient
Ethernet Ring technology to construct a
self-healing Ethernet fiber ring topology(ring resiliency is similar to that of
SDH/SONET networks). In case of link
failure on any segment of the ring, thepseudowire traffic is rerouted within
50 ms. A single ring supports up to
16 nodes.

Figure 2. Private or Leased Line over PSN

ETHERNET LINK PROTECTION
The unit performs link aggregation (LAG)
based on 802.3ad requirements.
Dual homing technology (1:1) allows
IPmux-24 to be connected to two
different upstream devices.
PSEUDOWIRE TRAFFIC PROTECTION
Pseudowire traffic can be backed up at
the pseudowire connection level. This
allows setting a different path for the
primary and secondary PW bundles. Bothbundles can be routed to the same ordifferent destinations and operate in the
1+1 and 1:1 modes.
In 1:1 redundancy with two remotedevices the PW bundles in the remoteunits operate in “mate” mode. In thismode each device monitors traffic on amate bundle and transfers data only when
the other bundle is inactive.

IPmux-24
TDM Pseudowire Access Gateway

ETHERNET SERVICE OAM (802.1ag)
The unit uses the end-to-end Ethernetlayer OAM protocol for proactive
connectivity monitoring, fault verification,and fault isolation, according to the IEEE
802.1ag and ITU-T Y.1731 requirements.
LINK OAM (IEEE 802.3ah)
Link-layer OAM according to IEEE 802.3ah
is used for fault indication and loopback
activation response.
MANAGEMENT
IPmux-24 can be configured andmonitored locally via an ASCII terminal, or
remotely via Telnet/SSH, Web browser orRADview.

Preserves investment
in legacy equipment inmigration to PSNManagement traffic can run over a
dedicated VLAN.
The RADview Service Center and Element
Manager packages control and monitor
pseudowire devices and circuits. The
Service Center’s intuitive GUI, “point andclick” functionality and easy-to-follow
wizards increase the efficiency andaccuracy of the service provisioning
process.
IPmux-24 performs RADIUS client
authentication. Using SSH and SSL
encryption protocols allows securecommunication over potentially insecure
IP-based networks.
The Syslog protocol is used by IPmux-24
to generate and transport event
notification messages over IP networks tothe central Syslog server. The Syslog
operation is compliant with the RFC 3164
requirements.

SNMPv3 support introduces a user-based
security model, enhances authenticationand encryption techniques, and ensuresmanagement traffic security.
Each management and service host has aseparate MAC address. As the unit
provides one default gateway, the user
can also specify static routes to enhance
the IP routing capabilities of the
management and pseudowire traffic.
Software is downloaded via the local
terminal, using XMODEM, or remotely,using TFTP. After downloading a newsoftware version, IPmux-24 automaticallysaves the previous version in non-volatilememory for backup purposes. Similarly,
copies of the configuration file may be
downloaded and uploaded to a remote
workstation for backup and restore
purposes.
OAM AND DIAGNOSTICS
The following RFC-2495 E1/T1 physicallayer performance statistics are available:
LOS, LOF, LCV, RAI, AIS, FEBE, BES, DM, ES,
SES, UAS and LOMF.
IPmux-24 performs an internal built-in test(BIT) after power-up. The results of thetest are visible via the local terminal.
LAN and IP layer network condition
statistics, such as packet loss and packet
delay variation (jitter) are monitored andstored by the device.
Fault isolation, statistics and event logging
are available.
Fault propagation initiates service port
alarms, e.g. E1/T1 LOS, to reflect network
fault conditions. Alarms detected atservice ports are propagated to theremote pseudowire device via the packet
network.

Data Sheet

Diagnostic loopbacks can be activatedinband.
Ethernet and IP-layer network condition
statistics, such as packet sequence errors(loss or misorder) and packet delay
variation (jitter), are monitored and storedby the device.
RAD’s TDM PW OAM mechanism verifies
connectivity, measures round trip delay
and prevents pseudowire configuration
mismatch.
The carrier-class version of IPmux-24
includes an alarm relay mechanism. The
minor and major alarms are forwarded toa remote alarm device via dedicated pinsof the external clock RJ-45 connector.

SIMPLE NETWORK TIME PROTOCOL
IPmux-24 employs Simple Network Time
Protocol (SNTP) for propagating andreceiving time information on a network,
according to SNTPv4 (RFC 4330)
requirements. SNTP is used to configure
data and time by learning the informationfrom a single or multiple NTP servers. The
clock can be configured to a local time bydefining UTC and DST offsets.
ENVIRONMENT
IPmux-24/H is an environmentally hardened
version intended for street-cabinet andcellular-tower installations.
Notes: The /H version requires temperature
hardened SFP transceivers.

Figure 3. Delivering Ethernet and TDM Services over Fiber Ring in the First MileIPmux-24
TDM Pseudowire Access Gateway

Specifications
E1 INTERFACE
Number of Ports
1, 2 or 4
Compliance
ITU-T Rec. G.703, G.704, G.706, G.732,
G.823

T1 INTERFACE
Number of Ports
1, 2 or 4
Compliance
ANSI T1.403, ITU-T Rec. G.703, G.704,
G.824
Data Rate
1.544 Mbps

Data Rate
2.048 Mbps

Line Code
B8ZS, B7ZS, AMI

Line Code
HDB3

Framing
Unframed, SF, ESF

Framing
Unframed, framed, multiframe; with orwithout CRC-4

Signaling
CAS (bit robbing), CCS (transparent)

Lowers Opex of TDM

Signaling
CAS, CCS (transparent)

service by utilizingLine Impedance
120Ω, balanced

packet infrastructure

75Ω, unbalanced
Signal Levels
Receive:
0 to -36 dB with LTU (long haul)
0 to -10 dB without LTU (short haul)
Transmit balanced: ±3V ±10%Transmit unbalanced: ±2.37V ±10%Jitter and Wander Performance
Per AT&T TR-62411, ITU-T G.824 (forinternal, loopback and external clock
modes)
Connector
Balanced: RJ-45
Unbalanced: BNC (RJ-45 to BNC adapter
cable is supplied)Line Impedance
100Ω, balanced
Signal Levels
Receive: 0 to -36 dB
Transmit pulse amplitude:±3V ±20%; 0 dB, -7.5 dB, 15 dB (CSU),
user-selectable±2.7V ±10%, 0 to 655 feet, (DSU),
user-selectable
Jitter and Wander Performance
Per AT&T TR-62411, ITU-T G.824 (forinternal, loopback and external clock modes)
Connector
RJ-45

Data SheetETHERNET INTERFACE
ComplianceIEEE 802.3, 802.3u, 802.1p&Q
Number of Ports
3, network or user
Port Combinations
3 fiber optic SFPs
2 fiber optic SFPs + 1 UTP
1 fiber optic SFP + 2 UTPs
3 UTPs (Fast Ethernet unit only)Type
SFP-based:
Gigabit Ethernet – 1000BaseSx,
1000BaseLX10, 1000BaseBx10

Fast Ethernet –100BaseFx,
100BaseLX10, 100BaseBx10
10/100/1000BaseT with SGMII

Built-in:
10/100BaseTFast and Gigabit Ethernet SPFs
For full details, see the SFP Transceivers
data sheet at www.rad.com

Jitter Buffer Size
0.5–180 msec (unframed) with 0.1 msec
granularity

Note: It is strongly recommended to order thisdevice with original RAD SFPs installed. This will
ensure that prior to shipping, RAD has performed
comprehensive functional quality tests on theentire assembled unit, including the SFP devices.
RAD cannot guarantee full compliance to productspecifications for units using non-RAD SFPs.
For detailed specifications of the SFP transceivers,
see the SFP Transceivers data sheet.

2.5–180 msec (framed) with 0.5 msec
granularity

Connector
LC

IPmux-24/A Adaptive Clock
Frequency accuracy: ±16 ppb and G.823
synchronization interface requirements(clause 6), when locked to a PRC(stratum 1) or SSU (stratum 2) clock
Frequency accuracy in holdover: ±16 ppb±1 ppb of aging per day

PSEUDOWIRE
Compliance
IETF: RFC 4553 (SAToP), RFC 5087
(TDMoIP), RFC 5086 (CESoPSN),
RFC 4618 (excluding clause 5.3 – PPP)ITU-T: Y.1413
MFA: IA 4.1, IA 8.0.0
MEF: 8, 9, 14 (EPL-certified)
Number of PW Connections
64

Figure 4. Drop-and-Insert of Full and Fractional E1/T1 Circuits and Ethernet over Fiber

IPmux-24
TDM Pseudowire Access Gateway

GENERAL
TimingInternal
Loopback
Adaptive

Indicators
PWR (green) – Power status
TST/ALM (red/yellow) – Test/alarm status
E1/T1 SYNC (green/red) – E1/T1
synchronization status

External input or output via optional
dedicated RJ-45 port: E1/T1 or
2048/1544 kHz squarewave (RS-422
electrical levels)

LINK/ACT (green) – Ethernet link/activity
statusManagement
SNMPv1, SNMPv3

Power
AC/DC: 100–240 VAC, 50/60 Hz or
48/60 VDC nominal (40 to 72 VDC)

TelnetRADview Service Center TDMoIP (orderedseparately)
ASCII terminal via V.24 (RS-232) DCE port
Diagnostics
E1/T1 local loopback
E1/T1 remote loopback
Facility Type 1 (FAC1) inband loopback
CSU loopback as per Telecordia GR-54
Statistics
E1/T1 (per G.826 and RFC 2495)
Ethernet (per RFC 2819)
Jitter buffer indication (overflow,
underflow, sequence error)
Alarm Relay
Via pin 6, pin 7 and pin 8 of the EXT. CLK
connector (RJ-45), optional

EXT. CLK (red/green) – External clock
status

DC: 24/48/60 VDC nominal (18 to 72 VDC)
Power Consumption
12W max
PhysicalHeight: 47 mm (1.8 in)
Width: 215 mm (8.4 in)
Depth: 147 mm (5.8 in)
Weight: 0.7 kg (1.5 lb)
Environment
Temperature:
IPmux-24: 0 to 50°C (32 to 122°F)
IPmux-24/H: -30 to 65°C(-22 to 149°F)
Humidity: Up to 90%, non-condensing

Carrier-grade voice
quality withoutcompression, or
silence suppression

Data Sheet

Table 1. IPmux Family Product Comparison
FeatureIPmux-2L(Ver. 1.0)

IPmux-4L(Ver. 1.0)

IPmux-4L (GbE)(Ver. 2.0)

IPmux-16L(Ver. 1.0)

IPmux-24(Ver. 3.5)

IPmux-216(Ver. 3.5)

TDM service ports

1, 2 × E1

2, 4 × E1

4 × E18, 16 × E1

1, 2, 4 × E1/T1

8, 16 × E1/T1

Ethernet networkports

1 × FE

1 × FE

1 × GbE network,
2 × GbE network/user

Ethernet subscriber 1 or 2 × FE
ports

1 or 2 × FE

4 × FE

Number of PWs

63

64

64

Multi-pseudowire

3

3

Advanced clock
recovery–Redundant power
supply3 × GbE network/user
3 × FE network/user

1 × GbE/FE network, 1 × GbE/FE network
1 × GbE/FE network/user
1 × GbE/FE
network/user
1 × GbE/FE

1 × GbE/FE

256

64

256

3

3

3

3

3

3

3

3

3

–

–

–

–

–

3

External clock port

–

–

–

3

Optional

3

Serial data port

Optional

–

–

–

–

–

SSH, SSL, RADIUS

–

–

–

–

3

3

Networkmanagement
systemRV-EMS

RV-EMS

RV-EMS

RV-EMS

RV-SC/TDMoIP,
RV-EMS (basic shelf
view)

RV-SC/TDMoIP,
RV-EMS (basic shelfview)IPmux-24
TDM Pseudowire Access Gateway

Ordering
STANDARD CONFIGURATIONSIPMUX-24/1E1/N/N/N
IPMUX-24/1E1CX/N/N/N$ TDM interface:
1E1

Single balanced E1 interface

1E1CX Single unbalanced E1 interface

IPMUX-24/1T1/N/N/UTP

1T1

Single balanced T1 interface

IPMUX-24/4T1/N/N/UTP

2E1

2 balanced E1 interfaces

IPMUX-24/FE/1E1/UTP/UTP/UTP
IPMUX-24/FE/1E1CX/UTP/UTP/UTP

2E1CX 2 unbalanced E1 interfaces
2T1

2 balanced T1 interfaces

IPMUX-24/FE/2E1/UTP/UTP/UTP

4E1

4 balanced E1 interfaces

IPMUX-24/FE/2E1CX/UTP/UTP/UTP

4E1CX 4 unbalanced E1 interfaces

IPMUX-24/FE/1T1/UTP/UTP/UTP

IPMUX-24/FE/2T1/UTP/UTP/UTP
IPMUX-24/FE/4E1/UTP/UTP/UTP
IPMUX-24/FE/4E1CX/UTP/UTP/UTP
IPMUX-24/FE/4T1/UTP/UTP/UTP
IPMUX-24/FE/A/4T1/N/N/UTP

4T1

4 balanced T1 interfaces

Note: Unbalanced E1 interfaces are provided via
RJ-45 to BNC adapter cables supplied with the
product.

+1 Network interface:

SPECIAL CONFIGURATIONSN

SFP-ready slot

IPMUX-24/+/!/?/~/CC/$/+1/+2/+3

1

Fast Ethernet/STM-1, 1310 nm,
multimode, LED, 2 km (1.2 mi)

2Fast Ethernet/STM-1, 1310 nm,
single mode, laser, 15 km(9.3 mi)2H

Fast Ethernet/STM-1, industriallyhardened, 1310 nm, single mode,laser, 15 km (9.3 mi)

3Fast Ethernet/STM-1, 1310 nm,
single mode, laser, 40 km(24.8 mi)3H

Fast Ethernet/STM-1, industriallyhardened, 1310 nm, single mode,laser, 40 km (24.8 mi)

4

Fast Ethernet/STM-1, 1550 nm,
single mode, laser, 80 km(49.7 mi)Legend+ Ethernet interface (Default=FE and GbEcapabilities)
FE

Fast Ethernet interface only

Note: FE option is mandatory when UTP/UTP/UTP
port combination is required.

!

Power supply (Default=AC/DC):WRDC Wide range DC power supply forenvironmentally hardened
device? Enclosure (Default=regular enclosure):
H

Environmentally hardened
enclosure~ Clock recovery (Default=standard clock
recovery):A

Advanced clock recovery
mechanism (per TDM port)

CC Package (Default=no carrier-classpackage)C

Carrier-class package (external
clock and alarm relay)

10A Fast Ethernet/STM-1, Tx –1310 nm, Rx – 1550 nm, single
mode (single fiber), laser (WDM), 20 km (12.4 mi)
10B Fast Ethernet/STM-1, Tx –1550 nm, Rx – 1310 nm, single
mode (single fiber), laser (WDM),
20 km (12.4 mi)

18A Fast Ethernet/STM-1, Tx –1310 nm, Rx – 1550 nm, 9/25
single mode (single fiber), laser(WDM), 40 km (24.8 mi)
18B Fast Ethernet/STM-1, Tx –1550 nm, Rx – 1310 nm, 9/25
single mode (single fiber), laser(WDM), 40 km (24.8 mi)
19A Fast Ethernet/STM-1, Tx –1490 nm, Rx – 1570 nm, 9/25
single mode (single fiber), laser(WDM), 80 km (49.7 mi)
19B Fast Ethernet/STM-1, Tx –1570 nm, Rx – 1490 nm, 9/25
single mode (single fiber), laser(WDM), 80 km (49.7 mi)

Data Sheet

5

5H

Gigabit Ethernet, 850 nm,
multimode, VCSEL, 0.55 km(0.3 mi)Gigabit Ethernet, industriallyhardened, 850 nm, multimode,
VCSEL, 0.55 km (0.3 mi)

6

Gigabit Ethernet, 1310 nm, single
mode, laser, 10.0 km (6.2 mi)

6H

Gigabit Ethernet, industriallyhardened, 1310 nm, single mode,laser, 10.0 km (6.2 mi)

7
8
8H

22B Gigabit Ethernet, Tx -1570 nm, Rx-1490 nm, single mode (single
fiber), laser (WDM), 80.0 km(49.7 mi)9F

Fast Ethernet, RJ-45 connector,
100m (238 ft)

9G

Gigabit Ethernet, 1550 nm, single
mode, laser, 80.0 km (49.7 mi)

GbE interface, RJ-45 connector,
100m (238 ft)

30

Gigabit Ethernet, 1310 nm, single
mode, laser, 40.0 km (24.8 mi)

10/100/1000BaseT (with SGMII),
RJ-45 connector, 100m (238 ft)

UTP Built-in 10/100BaseT

Gigabit Ethernet, industriallyhardened, 1310 nm, single mode,laser, 40.0 km (24.8 mi)

17A Gigabit Ethernet, Tx -1310 nm, Rx-1490 nm, single mode (single
fiber), laser (WDM), 10.0 km(6.2 mi)17B Gigabit Ethernet, Tx -1490 nm, Rx-1310 nm, single mode (single
fiber), laser (WDM), 10.0 km(6.2 mi)20

22A Gigabit Ethernet, Tx -1490 nm, Rx-1570 nm, single mode (single
fiber), laser (WDM), 80.0 km(49.7 mi)Gigabit Ethernet, 1550 nm, single
mode, laser, 120.0 km (74.5 mi)+2 Network/user interface:
See the network interface ordering
options above
Note: It is strongly recommended to order thisdevice with original RAD SFPs installed. This will
ensure that prior to shipping, RAD has performed
comprehensive functional quality tests on theentire assembled unit, including the SFP devices.
RAD cannot guarantee full compliance to productspecifications for units using non-RAD SFPs.
For detailed specifications of the SFP transceivers,
refer to the SFP Transceivers data sheet.

+3 User interface:
See the network/user interface
ordering options above

Table 1. Valid
Port Combinations
Network
Network/User
User
N

N

N

N

N

UTP

N

UTP

UTP

UTP

UTP

UTP

UTP

UTP

N

UTP

N

N

Note: The N (SFP-ready slot) option in Table 2 canbe replaced with any SFP transceiver supported by
IPmux-24.

Data Sheet
IPmux-24
TDM Pseudowire Access Gateway

488-100-07/11 (3.5) Specifications are subject to change without prior notice. © 1997–2011 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.

SUPPLIED ACCESSORIESPower cord
AC/DC adapter plug
CBL-RJ45/2BNC/E1/X
RJ-45 to BNC adapter cable (if an
unbalanced E1 interface is ordered)
OPTIONAL ACCESSORIES
RM-35/@
Hardware kit for mounting one or two
IPmux-24 units into a 19-inch rack

Legend@ Rack mounting kit (Default=both kits):
P1
Kit for mounting one unit
P2
Kit for mounting two units
CBL-DB9F-DB9M-STR
Control port cable

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@rad.com

Order this publication by Catalog No. 803782

The Access Company