Hello. Has anyone been able to successfully make data (dialup modem) calls through a TDM2400E? We're able to make fax and credit card calls fine, but cannot successfully make modem calls using a 56K modem connected to a patch panel connected to an FXS port which then gets bridged to an FXO port connected directly to a phone line. We have 'echocancelwhenbridged=no' set in /etc/asterisk/zapata.conf. We're dialing into a Lucent TNT which drops the call with a cause code of 11 (DCD-Detected-Then-Inactive. The modem detected DCD, but became inactive). The modem call works fine when connected directly to a phone line. Is there anything else that I can do to get this working? Thanks. Stephen Kratzer Network Engineer CTI Networks, Inc.
Stephen Kratzer wrote:> Hello. Has anyone been able to successfully make data (dialup modem) calls > through a TDM2400E? We're able to make fax and credit card calls fine, but > cannot successfully make modem calls using a 56K modem connected to a patch > panel connected to an FXS port which then gets bridged to an FXO port > connected directly to a phone line. We have 'echocancelwhenbridged=no' set > in /etc/asterisk/zapata.conf. We're dialing into a Lucent TNT which drops > the call with a cause code of 11 (DCD-Detected-Then-Inactive. The modem > detected DCD, but became inactive). The modem call works fine when connected > directly to a phone line. Is there anything else that I can do to get this > working? Thanks.I dunno about TDM2400E, but perhaps you might get a connection if you could slow the modem down by using the appropriate "extra settings" for the modem (IE +ms=v34 or -v90=0 etc) to force a non 56K/v90 connection? -Troy
Stephen Kratzer wrote:> cannot successfully make modem calls using a 56K modem connected to a patch > panel connected to an FXS port which then gets bridged to an FXO port > connected directly to a phone line. We have 'echocancelwhenbridged=no' set > in /etc/asterisk/zapata.conf. We're dialing into a Lucent TNT which dropsYou cannot make 56Kbps modem calls when there is more than one digital/analog transition in the call path. -- Kevin P. Fleming Director of Software Technologies Digium, Inc. - "The Genuine Asterisk Experience" (TM)