ZyXEL Communications omni.net LCD+M User Manual

 

7-3

in hashed form by CHAP. Sometimes CHAP can not be supported by the ISP. You may set 

[

S87.2=1

] to use PAP only. If you do not want to do authentication at all, set [

S118.3=1

] to 

disable the conversion. 

CHAP is described in RFC1994 and PAP is described in RFC1334. The only hash method 

supported by CHAP is MD5; MS-CHAP is not supported yet. Presently, authentication conversion 

works for clients only. 

 

NOTE: Disabling authentication may cause problems in Windows 
95. 

 

Enable authentication conversion. 

Depends on [

S87.2

] (default). 

Disable authentication conversion. 

Accept CHAP/PAP/None (default). 

Accept PAP/None only. 

Table 36. Authentication AT Commands

The ISDN channel can be utilized more effectively when using compression. Compression Control 

Protocol (CCP) is used by PPP to negotiate compression methods between peers. 

CCP starts after the PPP reaches the network phase. Both ends must support the same compression 

method to start packet compression. ZyXEL omni.net supports STAC/LZS. Right now STAC/LZS 

is only supported with single history check mode 0 (none), 3 (sequence) and 4 (extended). Mode 1 

(LCB) and mode 2 (CRC) are not supported due to patent limitations. CCP negotiation is described 

in RFC1962. STAC/LZS is described in RFC1974. 

The omni.net will monitor the DTE activity. If software compression has been negotiated, the 

ISDN TA will automatically disable STAC/LZS compression.