unable to forward voice or dtmf

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Hullo all,

I have successfully setup dahdi + libss7 + asterisk and call traffic
seems normal.

There is just 2 issues I need help resolving:

1. I get the following warning on asterisk cli very often: "unable to
forward voice or dtmf". What does this message mean? How do I fix it
2. I should have 2 signalling links each on the 1st channel of the 1st
and 2nd E1. The telco sees only one link up and ss7 show linkset 1
only show one link. How do I configure/enable the other?

Thanks, Joseph

Key Information:

Asterisk 1.6.2.9
libss7 version: 1.0.2
DAHDI Version: 2.3.0.1 Echo Canceller: MG2

/etc/dahdi/system.conf

# Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1" (MASTER)
span=1,1,0,ccs,hdb3,crc4
bchan=2-31
mtp2=1
echocanceller=mg2,2-31

# Span 2: TE4/0/2 "T4XXP (PCI) Card 0 Span 2"
span=2,2,0,ccs,hdb3,crc4
bchan=33-62
mtp2=32
echocanceller=mg2,33-62

# Span 3: TE4/0/3 "T4XXP (PCI) Card 0 Span 3"
span=3,3,0,ccs,hdb3,crc4
bchan=63-93
echocanceller=mg2,63-93

# Span 4: TE4/0/4 "T4XXP (PCI) Card 0 Span 4"
span=4,4,0,ccs,hdb3,crc4
bchan=94-124
echocanceller=mg2,94-124

# Global data
loadzone	= us
defaultzone	= us

/etc/asterisk/chan_dahdi.conf

[channels]
linkset=1
group=1
signalling = ss7
ss7type = itu
ss7_calling_nai=dynamic
callerid=asreceived
usecallerid=yes
hidecallerid=no
usecallingpres=yes
callwaitingcallerid=yes
threewaycalling=yes
canpark=yes
cancallforward=yes
callreturn=yes
echocancel=yes
echocancelwhenbridged=yes
relaxdtmf=yes
rxgain=0.0
txgain=0.0
useincomingcalleridondahditransfer=yes
pointcode = xxxx
adjpointcode = xxxx
defaultdpc = xxxx
networkindicator=national_spare

; First signalling channel
;sigchan = 1
;sigchan = 32

; First E1
cicbeginswith = 2
sigchan = 1
channel = 2-31

; Second E1
cicbeginswith = 33
sigchan = 32
channel = 33-62

; Third E1
cicbeginswith = 65
channel = 63-93

; Fourth E1
cicbeginswith = 97
channel = 94-124



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