Rockwell K56flex at 56000 to 32000 in 2000 bps increments
ITU-T V.34 Annex 12 at 33600 and 31200 bps
ITU-T V.34 at 28800, 26400, 24000, 21600, 19200, 16800, 14400, 12000, 9600, 7200, 4800, and 2400 bps
ITU-T V.32bis at 14400, 12000, 9600, 7200, and 4800 bps
ITU-T V.32 at 9600 and 4800 bps
ITU-T V.23 in two modes: split speed and half-duplex 1200/75(backchannel) bps
ITU-T V.22bis at 2400 and 1200 bps
ITU-T V.22 at 1200 bps
ITU-T V.21 at 300 bps
Bell212A at 1200 bps
Bell103A at 300 bps (Async)
Protocols
ITU-T V.42 (including MNP 2-4 and LAPM) Error Correction
ITU-T V.42bis (1K nodes) and MNP 5 Data Compression
Modem Standards
ITU V. 25—Automatic calling or answering equipment on dialup lines. This standard includes the procedures for disabling echo control devices for calls that are established manually and automatically.
The following list describes known problems with Portware versions 2.2.2.2 and 2.2.3.0. In some cases, workarounds are provided. If a workaround is not provided, the problem requires further investigation or a solution is being developed. For the latest information, consult "Cisco Connection Online."
Note If the client modem is not connecting to MICA or if a K56flex-compatible modem is not connecting at K56flex speed (see Table 2 for modulation speeds), try changing S0 to a setting of 2 to alleviate the problem.
CSCdj55296—In certain circumstances, call drops could occur when a K56flex call is established.
CSCdj71728—On rare occasions the uplink (receive) rate falls below 19.2 kbps during connection. Fails with various modems and line conditions.
CSCdj85230—Modem erroneously reports that it is in Steady_State_retrain mode. No workaround is needed because the modem works properly.
CSCdj45522 & CSCdj54904—Occasional call drops may occur when connecting a US Robotics Courrier modem.
CSCdj80580 —A V.42bis error occasionally occurs when connected to a Multitech or US Robotics Sportster modem, resulting in a call drop.
CSCdj56697, CSCdj58605, CSCdj38981—Unable to connect in MNP 4/5 with some client modems when LAPM is disabled. Since most modems use LAPM instead of MNP 4/5, this problem can be avoided in most cases by using LAPM.
CSCdj44302 and CSCdj13463—Uplink connect speeds are temporarily limited to 31.2 kbps max. This will be addressed in a subsequent release.
CSCdj74549—Some Zoom 14.4 modems connect in async mode, instead of LAPM, and the call drops after about 10 minutes.
CSCdj50614—When a USR X2 Sportster modem on a Macintosh computer is used for an ARA connection, the connection is unsuccessful.
CSCdj73645—Occasionaly when using a modem to dial out, the call disconnects within 2 seconds with "no answer."
CSCdj84343—On rare occasions, a modem call gets connected in async mode instead of in Error Correction mode.
CSCdj87010—The Robbed Bit Signalling (RBS) field displays an incorrect value of 0 when using the show modem command.
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information,productdocumentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
Modem: From North America, 408 526-8070; from Europe, 33 1 64 46 40 82. Use the following terminal settings: VT100 emulation; databits: 8; parity: none; stop bits: 1; and connection rates up to 28.8 kbps.
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Note If you are a network administrator and need personal technical assistance with a Cisco product that is under warranty or covered by a maintenance contract, contact Cisco's Technical Assistance Center (TAC) at 800 553-2447, 408 526-7209, or tac@cisco.com. To obtain general information about Cisco Systems, Cisco products, or upgrades, contact 800 553-6387, 408 526-7208, or cs-rep@cisco.com.
