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Interface converter PCM64/M


PCM64 Features:
  • G.703.1 64 kbps line interface
  • Maximum line attenuation - 10 dB
  • Full duplex mode
  • Data rate doubling capabilities
  • Digital interface V.35/RS-530/RS-449/RS-232/X.21 or Ethernet
  • Two DTE emulation modes
  • Digital, local, and remote loopbacks
  • Integrated BER tester
  • Alarm interface ("dry" relay contacts)
  • 48/60 VDC power
  • Declaration of compliance D-MDPD-7908

РСМ64/M converter is used to convert G.703 64 kbps interface signals into synchronous DTE digital interfaces. The converter can be employed to build a duplex data link using digital trunking equipment.

It allows to connect PCs, routers, terminals, etc. to digital trunking equipment with co-directional 64 kbps interface (G.703.1).

Model РСМ64/M is stand-alone (in the metal case of type Mini).
Devices DC powered 36 to 72 VDC. Possible AC Power Source 176 to 264 VAC from external Power adapter Cronyx AC-DC-48)

Built-in sync/async converter provides connection of various devices to asynchronous ports. Integrated BER tester and remote loopback capabilities allow to test the whole link from a local unit. The capability of enabling external receive and transmit clocks allows to select one of the two DTE emulation modes when you connect the converter to DCE.

PCM64/M converter provides double line rate (128 kbps).

Order codes:

Currently available models are listed in Prices. Please, contact technical support if you are unsure which model to choose.


G.703 64 kbps interface
Connector RJ-48 (female 8 pin)
Line coding G.703.1
Line impedance 120 Ohm symmetrical (twisted pair)
Receive signal level 0 to -10 dB
Transmit path synchronization from internal clock generator (INT)
from receive path (RCV)
from digital interface (EXT)
Digital interface
Data rate Async 115, 57.6, 38.4, 19.2, 9.6, 4.8, 2.4, 1.2 kbps
Sync 64 or 128 kbps
Timing signals TXC, RXC, ETC, ERC
Modem signals DTR, DSR, CTS, RTS, CD
Ethernet Interface
Interface Type IEEE 802.3 10BASE-T or 100BASE-T (100BASE-TX)
Connector Type RJ-45 (female)
Data Transfer Rate 64, 128 kbps
Mode 100 Mbps full duplex,
100 Mbps half duplex,
10 Mbps full duplex,
10 Mbps half duplex,
or autonegotiation
Address Table Size 15000 MAC addresses
Maximum Packet Size 1600 bytes, including MAC header
VLAN Support In acc. to IEEE 802.1q
Protocols Transparent or Cisco-HDLC bridging IEEE protocol, selected automatically
Alarm interface
Connector DB-9 (male)
Relay contacts current max. 600 mA
Relay contacts voltage max. 110V DC
Diagnostics modes
Loopbacks Digital (via digital interface)
Local (via G.703 line at a local unit)
Remote (via G.703 line at a remote unit)
Bit error rate tester Enabled using front panel button
Dimensions 180 mm x 156 mm x 36 mm
Weight 0,7 kg
Power Source
DC Power Source 36 to 72 VDC
(possible AC Power Source 176 to 264 VAC from Cronyx AC-DC-48)
Power Consumption 20 VA Max
Temperature 0 to +50 °С
Temperature of storing -40 to +85 °С
Relative Humidity 0 to 80 %, non-condensing


Some of the documents are in Adobe® Acrobat® Reader® format

PDF  PCM64/M. User's Manual in Russian
PDF  PCM64/M-ETV. User's Manual in Russian
PDF Справочник по интерфейсным кабелям Cronyx.

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