Network topology is the simplest one :modem(I tried with lot of different modems)-PBX MD110-q.sig_pri- 2620-ppp-2620-q.sig pri- PBX MD 110-modem(multitech).
One typical call seems that modems begin negotiate and then modem connection is broken (but signalization shows that call is connected for a moment-but it sounds unusual comparing to sound of normal modem call)
As I could see modem connection is broken because router doesn't switch into modem-relay (it doesn't recognize modem tone, it treates modem as voice and
keep call as g.729 call - 'sh voice dsp'). I tried with modem-passthrought and the same thing happens. I also use fax relay and this option works correctly.
When I connect PBX back to back without routers everything work correctly.
I tested with all version of Ios (12.2.11.T10, 12.3.x,..) and the symtoms were the same.
I ckecked for slips on E1 interface and everything is ok.
Configuration details (details connected with VoIP)
codec complexity high
voice service voip
fax protocol t38 ls-redundancy 0 hs-redundancy 0
call start slow
modem relay nse codec g711alaw
modem relay sprt retries 6
controller E1 1/0
pri-group timeslots 1-31
no ip address
no logging event link-status
isdn switch-type primary-qsig
isdn incoming-voice voice
no cdp enable
dial-peer voice 1 pots
dial-peer voice 1000 voip
session target ipv4:10.10.10.1
fax rate 9600 bytes 40
Have anybody tried this feature and which IOS with?
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.