Type: Driver
File Name: zyxel_u_37998.zip
File Size: 14.4 MB
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The sound of ring is strange when V. Can't initiate RDL with other vendor modem. Async none error control mode: TxD LED is not light when modem transmits ZyXEL U-336R.

Use DTMF generation function will let modem hang. Use Russian CallerID function will let modem hang.


Added new features In this case, dial backup will not work. In sync mode, drop the connection and then change "data format" to async, the connection speed is still bps. You have to drop line again and then the connection speed will be back bps again. Set s18 equal to an invalid value, the modem will hang. It would appear some garbage after connection in sync or SD mode. If you initial remote configuration for the second times, the modem will hang. And it will cause the throughput low. When two modems connected at 4-wire leased line ZyXEL U-336R dial backup enabled, if the answer modem power on without connection at leased line, it can't detect ring. It displays the wrong word. If you dial a pulse dial from the attached phone ,sometimes the modem will false alarm to ring. US will not show "System ZyXEL U-336R at initialization.

The modem will auto answer after first ring even if s0 is not equal to 0.


The modem will produce some garbage at sync mode when the modem rings. Issue "CIC" ZyXEL U-336R will let s0 equal to 2.

Zyxel Support Center

It will not handshake again after line drop at synchronous leased line mode. Sometimes the modem will not mute after connection. The remote management from US to UR via 2nd channel. If you transfer file and change the UR's settings from US at the same time. If you don't transfer file, it works fine. The line status report of local is not different from the report of remote NMS system. Reset from profile to dialup line mode from rack controller at leased line mode, it would fail to detect ring. It would get some problem when ZyXEL U-336R manage US for the second time. The remote management via second channel with Sync mode. When you set global slot and reset profile to factory default from controller. It would spend about 8 secs to complete global settings.

RLN - Release Notes Fw. v Zyxel Uxx

ZyXEL U-336R Can't change the value of S3-register from ZyView or Rack controller. When you reset profile in US. The "remote Id" will eliminate and you must assign again. Fax releated bugs fixed: Issue ATD after connection will respond error in some country.

Improve the compatibility with Fax machine. The modem can't quickly abort after issue "ATD" command. Zyxel U R - fax / modem overview and full product specs on CNET. ZyXEL Communications Corp. edited by ZyXEL U-336R Recla September 29, Release Note on ZyXEL's "G3" Modem series (= UR/RE, UE/S) Version.

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