4 Channel E1/T1 over Ethernet or IP


  • PacketBand -TDM-4 supplies clock-locked clear channel or structured E1/T1 circuits over Ethernet, IP or MPLS networks.  It supports up to four E1/T1 and can be used in pairs or with other members of the Packetband range. 
  •  Multi-standard TDM pseudowire support: CESoPSN, SATOP, TDM over IP
  •  Highly accurate and stable clock recovery
  •  G.823/4 Synchronization levels
  •  Up to 4 E1/T1 interfaces
  •  Five 10/100/1000Mbps RJ45 interfaces
  •  Two 100/1000Mbps SFP interfaces
  •  Support for Jumbo Packets up to 9,600 bytes on Ethernet ports
  •  Port based VLAN, 802.1Q VLAN including Q-in-Q

Technical Notes

TDM over IP – What is it and how can it benefit me?

TDM over IP provides the ability for legacy TDM devices to communicate via modern packet switched IP networks. These legacy devices would typically have E1, T1 or serial interfaces. Our range of TDM over IP solutions enable connectivity for this legacy equipment over contemporary Ethernet / IP networks.


Item Description
Clock Recovery

Capable of exceeding G.823/4 Synchronous Interface requirements (subject to network performance

Ethernet Interfaces

5 x 10/100/1000BaseT RJ45
2 x 100/1000 Dual speed SFP slots

Local Managment Port

Auto-sensing to 115kbps;  Also remote access via IP network

IP & MAC Address

MAC address per port, IP address, subnet mask and default gateway. Support for DHCP


Width: 11.5” (292mm);  Depth: 7.87” (200mm);  Height: 1.73” (44mm)

TDM Port (T1)

4 Ports
User switchable E1/T1; RJ45 connector
100 Ohm
Unframed 1.544Mbps;  Framed 1.536Mbps CCS
ESF or D4 selectable; B8ZS or AMI selectable
Transparent to user signalling

TDM Port (E1)

4 ports
 User switchable E1/T1
 RJ45 connector
 120 Ohm
 75 Ohm user-selectable via convertor cable
 G.703 unstructured; • G.704 channelized
 ITU G.706
 Selectable CRC4/non-CRC4 HDB3
 Transparent to user signalling


Operating temperature -20˚C to +65˚C ;  Humidity 10-90% non-condensing

Regulatory Compliance

• FCC Class A; CE Mark
• MET Mark (North American safety)
• EN60950-1:2006+A1:2010+A12:2011;• EN55022:2010;• EN55024:2010

  • EC EN60950-1:2002
  • ACA TS001:1997
  • ACS/NZ60950:2000
  • AS/NZS3260:1993
  • IEC950



1 Year

Ordering Information

Order Code Description
NE-PB-PLUS-TDM-4-AC Quad T1/E1 CESoPSN unit; 5 x 10/100/1000BaseT; 2 x 100/1000 SFP; AC Power
NE-PB-PLUS-TDM-4-DC Quad T1/E1 CESoPSN unit; 5 x 10/100/1000BaseT ;2 x 100/1000 SFP ; DC Power

More Information