The iTN221 is a “Pizza Box” 1.5U (full ETSI) sized, next generation multiservice access node. It offers a dual core architecture for both packet and SDH/TDM transmission.
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The iTN221 is a "Pizza Box" 1.5U (full ETSI) sized, next generation multiservice access node. It offers a dual core architecture for both packet and SDH/TDM transmission.

The iTN221 supports up to 2 x 1G and/or 2 x STM-1/4 uplink capacities, and a built-in PDH multiplexer function, DXC non-blocking clock cross connect matrix at 64K level and TDM pseudo-wire functionality for TDM to Ethernet/IP/MPLS service migration.

The iTN221 supports three service slots suitable for various sub cards: Voice (FXS/FXO/E&M), Ethernet (GE/FE), C37.94, 64K codirectional, Data RS232/RS485 etc.

It provides utilities and transportation companies with reliable connectivity for controlling signals, mission critical data, voice, video monitoring and electrical protection services. It supports the smooth transition from PDH, SDH to the packet transmission network.

For mission critical services, the system maximizes uptime and provides carrier-class network availability using G.8032/G.8031 Ethernet and G.8131/Wrapping-Steering MPLS-TP protection that provide sub-50msec recovery as well as hot swappable redundant power supplies. Extensive management capabilities are provided for all aspects from equipment installation and service provisioning to real-time system operation and performance monitoring. The iTN221 offers a cost-effective solutions for providing MEF-compliant CE2.0 Ethernet services, as well as E1 and pseudowire connectivity for lease-lined and 2G/3G/LTE mobile backhaul with integrated SyncE and 1588v2 PTP. Altogether, the iTN221 can be used to reduce CAPEX and OPEX and build a future-proof infrastructure that can scale both in capacity as well as migrate additional services to packet infrastructure without further equipment investment.


• Combined dual cores can deliver Ethernet and TDM traffic in one system
• Available with 2 x 1G SFP uplink, 4 x GE in the mainboard and 4 x GE subcard module (with PoE)
• Available with 2 x STM-1/4 SFP
• Available with E1 TDM, E1 PWE3, GE, Voice, V.24/RS232, TP and 64K Codirectional at client side
• E-Line, E-LAN and E-Tree are compliant with CE2.0 relevant MEF specifications
• Uplink redundancy and resiliency with ITU-T G.8031 (ELPS), G.8032 (ERPS) on Ethernet side, G.8131 MPLS-TP liner protection and
Wrapping/Steering MPLS-TP ring protection on PTN side and 1+1 liner MSP, SNCP, 1+1 LPP on SDH side
• IEEE802.3ah, 802.1ag, ITU-T Y.1731/SLA, L2MPLS-TP LSP/PW/section OAM
• VLAN, QinQ, QoS, LACP, and static MPLS compliant with MPLS-TP
• PWE3 tributary card supports SAToP, CESoP, MPLS, CESoETH (MEF) and UDP/IP encapsulations
• Compliant with 1588v2 (PTP) OC/BC/TC mode and SyncE
• 2Mbit, 2MHz input/output external clock
• Dry contact Alarm Relay (Input/output alarms)
• Extended temperature range (-20 to 65˚C)
• Environmental Standards: CE, UL, EN 50121-4, IEC61000-4-2/3/4/5/6/7/8/9, 11/12/13/14, 29 IEC61850-3
• SNMP (NView compatible) via in-band and out-of-band network channels








Number of Service slots



SDH cross-connect

86 x 86 VC4 or 4032 x 4032 VC12

8 x 8 VC4 or 504 x 504 VC12

Packet switch capacity



STM-16 interface



STM-1/4 interface



E1 channel



DS3/E3 channel



PDH optical tributary channel



EOS interface



FE port



GE port

128 x GE for tributary, 8 x GE for aggregator


10GE port




4 x STM4/16 x STM1


128 x E1/T1

20 x E1/T1

PCM Interfaces: FXS/FXO/E&M, V24/RS232, C37.94, V35, G.703 CoDir



• iTN221-4GE, including the chassis, main card, double power, fans, and three sub card slot
• The main card includes: 2 x STM-1/4, 2 x GE uplinks, 8 x E1’s and 4 x GE user
• iTN221-SUB-16C64K, G.703 codirectional subcard, 4 x ports
• iTN221-SUB-RS24, Serial interface subcard, Provides  4 x V.24/RSV222/RS485 or 8 x RS232 ports
• iTN221-SUB-TP, C37.94 subcard. Support two pairs of optical interface for C37.94 service. Support standalone, or configuration for
protection. Bandwidth is N x 64k (N=1~12) every channel
• iTN221-SUB-10FXS/0, FXS/FXO subcard, 10 x ports
• iTN221-SUB-4GE-PWR, Provides four GE service ports and including two POE interface. The system can only use one card
• iTN221-SUB-4E1, E1 subcard, 4 x ports
• iTN221-SUB-4E&M, E&M subcard, 4 x ports
• iTN221-SUB-8MT, 8 magneto channels