E1/T1 Monitor 3.0

E1/T1 Monitor 3.0 provides permanent monitoring of signalling on E1/T1/J1 (2 or 1.5 Mbit/s) lines. It can be connected to the GSM Gb, Abis, A, C, D, E and F links and on 3G Iub, Iucs and Iups links.

E1/T1 Monitor 3.0 decodes layer 1 and layer 2 of the protocol stack, timestamps and then forwards the monitored data to an external server over TCP/IP. The monitored data can be used for real-time billing, fraud detection and network supervision.

Datasheet (PDF)

Product Specification (PDF)

E1/T1 Monitor 3.0

Hardware Features:

  • Dual 48 VDC power inputs.
  • Dual 10/100 Mbit/s ethernet, both can use Power over Ethernet (PoE).
  • Low power consumption (typical: 6 W).
  • No moving parts.
  • 19" rack mount, 1U high, 144 mm (6" ) deep.
  • 64 E1/T1 receivers, i.e. capable of monitoring both directions of 32 E1/T1/J1 links.
  • E1/T1/J1 inputs are compatible with -20 dB and -30 dB protected monitor points (ITU-T G.772) for non-intrusive monitoring and normal, unattenuated E1/T1/J1 signals for connection to a MUX or DXC.


Part  #Price (EUR)Description
11-0005 4 200 3 700 3 200 E1/T1 Monitor 3.0, including chassis.
12-0010 1 500 optional 'pro' licence key to increase L2 decoding capacity

There are no yearly fees or support charges. The only things we add are shipping (at cost) and, if required by the destination country, VAT and import duties.

Layer 2 Signalling:

Protocol Performance (per module) Standards
ISDN LAPD (16, 32 and 64 kbit/s)400 channelsITU-T Q.921
SS7 MTP-2 (56/64 kbit/s) 240 channels ITU-T Q.703
ANSI T1.111.2
SS7 MTP-2 (Nx64 kbit/s) up to 120 channels
up to 16 Mbit/s
ITU-T Q.703 Annex A
ANSI T1.111.2
Frame Relay up to 96 channels
up to 1488 input timeslots
up to 48 Mbit/s output
ITU-T Q.922
HSSL (ATM AAL5 based) 16 channels, 32 Mbit/s ITU-T I.361
ITU-T I.363.5
ANSI T1.111.2A
Bellcore/Telcordia GR-2878
ATM (AAL5, AAL2 and AAL0) 16 channels, 32 Mbit/s ITU-T I.361
ITU-T I.363.5
ITU-T I.363.2

In-band data access

For applications requiring unprocessed access to the data, for instance error analysis or voice quality measurements, the probe can forward the links to an external application without any L2 processing.

In-band signalling (DTMF, CAS MFC R2, SS5) can also be applied to voice timeslots.