NAMC-STM1/4: SDH Line interface cards

AdvancedMC (AMC) for SS7, ISDN or 3G/3.5G mobile applications in optical OC-12/STM-4 & SONET

discontinued ! - replacement product: NAMC-SDH

Both the NAMC-STM1 and the NAMC-STM4 are telecommunications interface boards in the Advanced Mezzanine Card (AdvancedMC or AMC) form factor. The NAMC-STM1/4 are targeted at telecom applications dealing with Synchronous Digital Hierarchy (SDH), such as SS7, ISDN or 3G/3.5G mobile applications in optical OC-12/STM-4 and SONET environments.

Equipped with an add/drop multiplexer/demultiplexer chipset, the NAMC-STM1/4 are ideal single board platforms to interface between the frame-oriented STM-4/SDH networks and classic TDM (Time Division Multiplex) standards as E1/T1/J1 or E3/T3/J3. Possible applications are add/drop or terminal mulitplexers.


Key features
Technical details
Block diagram
Order code
Optical Interface on Front Panel
  • 155Mbps OC3/STM1 line interface on standard OC-3/OC-12 SDH STM-1 connectors
  • 622Mbps OC-12/STM-4 line interface on standard OC-3/OC-12 SDH STM-4 connectors

VT/TU Access

  • OC-3/SMT1 and OC-12/STM-4 framers connected to an add/drop multiplex/demultiplex chipset
  • Access to VT/TU tributary unit groups within the VC3, VC4 and VC4-4c virtual containers
  • Extract/insert of 84 T1/J1 or 63 E1 streams (NAMC-STM-1) or 4x 84 T1/J1 or 4x 63 E1 streams (NAMC-STM4) including respective clocking information contained in a single STM-1 or STM-4 SDH frame
  • Supported mappings: VT1.5/VT-2 or TU-11/TU-12 to VC3/VC4/VC4-4c or STM4/STM4c

T1/J1/E1 Access
  • NAMC-STM1: 84 T1/J1 or 63 E1 framers
  • NAMC-STM4: 4x84 T1/J1 framers or 4x63 E1 framers
  • Individual Rx/Tx, CLK and SYNC signals
  • T1 framing standards: SF, SLC-96 and ESF
  • E1 framing standards: G.704 and G.706 (CRC-4 multiframe)
  • J1 framing standards: TTC JT-G.704 as well CRC-6 calculation
  • Full jitter attenuation

TDM and I-TDM Interface
  • E1/T1/J1 framer interfaces to the on-board timeslot interchanger (TSI) chipset
  • Incorporated TSI and TDM-to-I-TDM bridge (on-board FPGA)
  • Flexible routing and multicasting of 64kbps timeslots between the various E1/T1/J1 streams (TSI)
  • TDM-to-I-TDM bridge converts the TDM oriented bit stream into Ethernet packets and vice versa
  • Ethernet packets are sent and received via either the AMC ports 0 or 1 (selectable) 1000BaseT-BX Ethernet interface (Fabric A).
  • Optional 32MHz clocked H.110-like TDM backplane interface on the AMC extended connector (TSI)
IPMI and Compliance
  • PICMG AMC.0 R1.0
  • PICMG 2.9 R1.0

I-TDM and Compliance

  • GigEth (Fabric A) at common options region
  • PICMG SFP.1 R1.0

TDM (option)

  • H.110 like 32MHz clocked TDM interface at extended option region


  • One OC-3 SDH/STM-1 (NAMC-STM1) or OC-12 SDH/STM-4 (NAMC-STM4) optical fibre interface using standard connector on front panel (SC duplex single or multi-mode transceiver),
  • One GbE at common options region (port 0 or port 1, selectable)

PCIe Interface and Compliance

  • X4 PCIe interface (optional)
  • PICMG AMC.1 R1.0



Indicator LEDs

  • 4 software programmable LEDs on the front panel

Operating System Support

  • (host drivers)
  • OK-1, VxWorks, LINUX

Power Consumption

  • 3.3V, 12V, 20W typ.


  • Temperature (operating): 0ºC to +50ºC with forced air cooling
  • Temperature (storage): -40ºC to +85ºC
  • Relative Humidity: 10% to 90% at +55ºC (non-condensing)

  • High density multiplexers, multi-service switches, edge routers and digital modems
  • Frame Relay switches and access devices
  • SONET/SDH add drop and terminal multiplexers
  • Optical access equipment
  • Digital access cross-connect systems
Rev #
Date Last Modified
namc_stm1_4_ds Data Sheet pdf 335 KB 1.0 11-07-2012
namc_stm1_4_man_hw Hardware Manual pdf 720 KB 1.3 21-02-2013

NAMC-STM1/4 block diagram

Product Code: NAMC-STM1 - [Option I]-[Option N]-[Option A] -or- NAMC-STM4 - [Option I]-[Option N]-[Option A]

I -M
Type of optical Interface M = Multimode Interface
S = Single Mode Interface
N -1
Number of optical Interfaces 1 = Single optical interface (Standard Configuration)
2 = Dual optical interface (APS or monitoring Applications)
A -T
Kind of application T = Termination applications (single Temux)
M = Monitoring applications (dual Temux) - not available with NAMC-STM4 variant


Rev #
Date Last Modified
DRV-NAMC-STMx-LINUX-PRJ Project License Linux Driver for NAMC-STM1 and NAMC-STM  1.0 07-07-2011