SDH Monitor 3.0

The SDH Monitor 3.0 extracts signalling and voice from E1/T1 streams carried on SDH/SONET links in fixed and mobile telephone networks. The probes connect to 155Mbit/s STM-1/OC-3 links, extract a subset of the the E1/T1 links inside them, decode layer 1 and layer 2 of the protocol stack and then forward the monitored data to an external server over TCP/IP.

Data Sheet (PDF)

Product Specification (PDF)

SDH Monitor 3.0

Hardware Features

  • Two or six SFP sockets in 1U. One chassis can monitor both directions of one or three SDH/SONET links.
  • Dual 48VDC power inputs
  • Dual 10/100Mbit/s ethernet, both can use Power over Ethernet (PoE)
  • Low power consumption (typical: 6 W per sub-module or 18 W per chassis)
  • No moving parts
  • 19" rack mount, 1U high, either one or three sub-modules per chassis


Part  #Price (EUR)Description
11-0009 4 760 4 140 3 600 SDH Monitor 3.0, including chassis, with one STH 3.0 sub-module.
11-0010 8 418 7 320 6 465 SDH Monitor 3.0, including chassis, with two STH 3.0 sub-modules.
11-0011 12 200 10 500 9 200 SDH Monitor 3.0, including chassis, with three STH 3.0 sub-modules.
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 sub-module) Standards
ISDN LAPD (16, 32 and 64 kbit/s)400 channelsITU-T Q.921
SS7 MTP-2 (56/64 kbit/s) 96 channels ITU-T Q.703
ANSI T1.111.2
SS7 MTP-2 (Nx64 kbit/s) up to 96 channels
up to 12Mbit/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.