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flopez2
Beginner

Audio Delay Cisco 4331 NEC NFAS

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
!

!

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