UCM-3220                 Universal Voiceband Data Modem 

The MuLogic UCM-3220 is a universal  voiceband modem for reliable data communication over dial-up and 2-wire or 4-wire leased lines for data rates up to 14.4 kbps.  The modem is available as compact standalone unit, as card for the high density UCF-30 rack, and as module for use in various hardware environments.  

The UCM modems can be integrated in a standard Network Management environment and offer remote configuration, control and monitoring, supporting SNMP, WebBased management and Telnet access. Alarm events are automatically reported to a central network management system. The detailed alarm reporting is useful to save precious time e.g. trying to establish if a network fault is due to a line failure or a power failure at the remote location 

The UCM-3220 has been designed to suit a vast majority of voice-band data-modem applications.  It supports all current modulation standards varying from V.21 to V.32bis and can be used on point-to-point and multipoint lines. 

When used as a leased line modem, the UCM-3220 can use the dial-up network for back-up: If the leased line degrades in quality or fails completely, then the UCM-3220 will restore the connection over the dial-up line. With the dial-up line in use, the leased line connection will be constantly monitored to check when normal leased line operation can be restored. 

  • Multistandard: V.32bis, V.32, V.33, V.29, V.27ter, V.27bis, V.26bis, V.26, V.22bis, V.22, V.23 and V.21. The modem also operates in Bell 224, 212A and 103 modes.
  • Dial-up and 2-wire/4-wire point-to-point and multipoint leased Line operation 
  • Multipoint leased line operation in V.26, V.27bis and V.29 modes for use on conditioned multidrop leased lines and normal unconditioned cable.
  • Supports both synchronous and asynchronous data formats.
  • Automatic leased line back-up over dial-up lines. Restores operation over the dial-up network in case of a leased line failure.  Leased line quality monitor for automatic return to leased line. 
  • At power-loss, the remote modem can signal the central site modem to indication the difference between a line fail or power fail.
  • Automatic Rate Change for continuously optimizing the transmission rate with respect to the line conditions. The modem continuously monitors the signal quality and selects the appropriate transmission rate to minimize errors and maximize the throughput. 
  • AT command set for use in asynchronous (Personal Computer) and synchronous applications. 
  • V.25bis synchronous command set for use with e.g. IBM AS 400 computer systems. 
  • Automatic detection (AutoBaud) of asynchronous commands up to 115.200 bps 
  • Automatic mode detection between V.32bis, V.32, V.22bis and V.22 for dial-up operation
  • Asynchronous control port for modem management, configuration and control. This port is always active allowing the user to change features or monitor the line quality even while the modem is online. In V.32 and V.32bis modes also the remote modem can be accessed.
  • Password and Call-back security to control unauthorized access to the attached DTE. 
  • Automatic password exchange upon connection to other UCM modems. 
  • Remote Access over main channel and secondary channel for configuration, control and diagnostics. 
  • 16 sets of pre-programmed application profiles are stored in the modem. 

  • If none of these profiles is appropriate to your application, they can be customized and then saved in one of four non-volatile memory locations.  
  • Error Correction/Data compression for reliable communication as per ITU-T V.42 LAP-M and MNP4/5 
  • Simulated switched carrier operation as per ITU-T V.13 . 
  • Integration in  Network Management System by means of MuLogic NMS control units for SNMP, WebBased management and terminal/telnet access.
  • Operating software resides in Flash memory, upgradable by means of  X-modem file transfer.


Multistandard modem 
The UCM-3220 incorporates a large variety of modem standards. Nowadays it is difficult to find dedicated V.26, V.27 or V.29 modems. In order to maintain networks with large amounts of such modems the UCM-3220  features the ability to interconnect with nearly every modem that is currently used on dial- up networks or leased lines:  V.32bis, V.32, V.33, V.29, V.27ter, V.27bis, V.26bis, V.26, V.22bis, V.22, V.23, V.21 and  Bell 224, 212A and 103 modes.  

Multidrop modem 
When configured for V.26, V.27bis or V.29 operation, the UCM-3220 can be used on multidrop lines. The modem supports two modes: constant impedance for dedicated amplified and conditioned multipoint/multidrop lines as supplied by the telephone companies, and switched impedance for use on unconditioned cable.



Supported Modem modes  

  • V.33 14400, 12000 bps full duplex on 4-wire lines
  • V.32 bis 14400, 12000, 7200 bps full-duplex on PSTN and leased lines 
  • V.32 9600, 4800 bps full-duplex on PSTN and leased lines 
  • V.29 9600, 7200, 4800 bps half-duplex on 2-wire or PSTN 
  • V.29 9600, 7200, 4800 bps full-duplex on 4-wire lines 
  • V.27 ter 4800, 2400 bps half-duplex on PSTN 
  • V.27 bis 4800, 2400 bps full-duplex on 4-Wire lines 
  • V.27 bis 4800, 2400 bps half-duplex on 2-Wire lines 
  • V.26 bis 2400, 1200 bps half-duplex on PSTN 
  • V.26 2400 bps (alt.A and alt.B) full-duplex on 4-wire lines 
  • V.26 2400 bps (alt.A and alt.B) half-duplex on 2-wire lines 
  • V.22 bis 2400 bps 1200 bps full-duplex on PSTN and leased lines 
  • V.22 1200 bps full-duplex on PSTN and leased lines 
  • V.23 1200 bps full-duplex on 4-wire lines 
  • V.23 1200/75, 75/1200 bps duplex or 1200 bps half-duplex on PSTN 
  • V.21 300 bps full-duplex on PSTN and leased lines 
  • Bell 224 2400 bps full-duplex on PSTN and leased lines 
  • Bell 212A 1200 bps full-duplex on PSTN and leased lines 
  • Bell 103 300 bps full-duplex on PSTN and leased lines
Auto dial and configuration 
  • V.25bis and AT-commands on main port 
  • AT commands on control port
  • All command modes both Async and Sync (HDLC, SDLC, Bisync) 
  • Selectable originate or answer carrier in calling mode 
Auto answer  
  • Conforms ITU-T V.25 
  • Selectable answer or originate carrier in answer mode 

Half-duplex and Multipoint applications 

  • Anti Streaming time-out selectable from 1 to 255 seconds 
  • Switched impedance operation 
  • Echo protect sequence on V.26 and V.27 modes 
  • Long train sequence for V.27 modes
  • Train on Data for V.29 multipoint operation 
  • Simulated switched carrier as per ITU-T V.13 in V.22bis, V.32bis and V.34 
Error Correction/Data Compression for asynchronous data 
  • ITU-T V.42 error correction/data compression 
  • MNP4/5 error correction/data compression 
DTE Interface  
  • Compatibility: ITU-T V.24 TTL (CEPT T/CD 01-14)
  • Supported circuits: 102, 103, 104, 105, 106, 107, 108/1, 108/2, 109, 113, 114, 115, 117, 125, 133, 140, 141, 142
  • Synchronous data: 1.2, 2.4 .. 33.6 Kbps in steps of 2.4 K (+/- 0.01%) 
  • Synchronous timing: internal, external or slaved to receiver 
  • Asynchronous data: 0.3, 1.2, 2.4, 4.8, 9.6, 19.2, 38.4, 57.6, 115.2 Kbps (+/- 2.5%) 
  • Async. data format: 10 or 11 bits even, odd or no parity for command modes 8, 9, 10 or 11 bits for data transmission modes 
  • Flow control: both "software" control: Xon/Xoff or user defined characters and "hardware" control: circuit 106 and circuit 133 (105) 
Async/Sync conversion 
  • Asynchronous to synchronous conversion as per ITU-T V.14 
  • Basic range: +1% to -2.5% 
  • Extended range +2.3% to -2.5% 
  • Test loops: DL, RDL and AL as per V.54 loop 2 and loop 3 
  • Automatic self check on power-up 
  • Local and remote DTE and DCE status information 
Line Requirements  
  • PSTN/POTS or ITU-T M.1020, M.1025, M.1040 leased lines 
  • Unloaded telephone-type cable up to 15 Km (V.34 mode) 
  • Selectable equalizers for ITU-T M.1040 or unloaded lines. 
Line Transmission Characteristics 
  • Impedance:  600 Ohms 
  • Return loss @ 600 Ohms: > 25 dB
  • Return loss @ ETSI Zref: > 11 dB
  • Symmetry: better than 70 dB 
  • Noise and spurious: below -75 dBm 
  • Receive level range: -7 to -43 dBm, thresholds at -23, -33 or -43 dBm 
  • Transmit levels: selectable from maximum allowed level to -21 dBm in 1 dB steps.
Power Supply (module / rack card) 
  • Operating voltages: 5V +/- 3 % / +10V +/-20% / -10V +/-20%
  • Power consumption: 3.5 Watts max.
  • Operating current:  700 mA max.
Power Supply (Desktop) 
  • Operating voltage range: 100 - 240V~ / 47-63Hz/ 270mA
  • Power consumption: 5 Watts max.
Environmental Characteristics  
  • Operation temperature: 0 to 50 oC (95% humidity non-condensing) 

  • (Extended temperature range (-20 to +60) available on request) 
  • Storage temperature: -50 to +70 oC 
  • Network connection: ETSI TBR 15, TBR 17, TBR 21
  • EMC (emission): EN 55022
  • EMC (immunity): EN 50082-1
Physical Characteristics  
  • Module: Single Eurocard CEPT T/CD 01-14 Type I 10x16 cm. 
  • Rack Card: Single Eurocard CEPT T/CD 01-14 Type I 10x16 cm. Front panel: 3 HE, 5TE
  • Desktop modem: 250x136x38mm (LxWxH)

MNP is a trademark of Microcom inc. IBM and AS 400 are trademarks of IBM Corp.   
This document is for general information purposes only. All specifications are subject to change without notice.  


MuLogic b.v. 
Olivier van Noortstraat 4 
3124 LA Schiedam 

Tel:  +31 10 4700077 
Fax: +31 10 4700958 

E-mail: inform@mulogic.com 
Web: www.mulogic.com