Hi,
We have an NEC phone system that uses NFAS two D channels and one B channel.
Currently only using two D channels as a primary and secondary set up on a Cisco 4331
We have audio delay on outgoing calls that we need to speak in order to hear the other end.
If we don't speak then the audio does not work.
When we make a call and have background noise then we can hear the other end right away.
Another issue that might be related is that no audio from the other side on calls being forwarded.
Here is the current configuration on the CPE Device
controller T1 0/1/0
framing esf
linecode b8zs
cablelength long 0db
pri-group timeslots 1-24 nfas_d primary nfas_int 0 nfas_group 1
!
controller T1 0/1/1
framing esf
linecode b8zs
cablelength long 0db
pri-group timeslots 1-24 nfas_d backup nfas_int 1 nfas_group 1
!
controller T1 0/1/2
shutdown
framing esf
linecode b8zs
cablelength long 0db
pri-group timeslots 1-24 nfas_d none nfas_int 2 nfas_group 1
!
!
interface Serial0/1/0:23
description primary d channel
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type primary-ni
isdn protocol-emulate network
isdn incoming-voice voice
isdn send-alerting
isdn bchan-number-order ascending round-robin
isdn sending-complete
ppp authentication chap
ppp multilink
!
!
