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New Member

one-way Audio with VOIP on Cisco 1861

Hi,

I'm having problems in configuring my SIP accout on my Cisco 1861 router. The router registers successfully at the sip provider, calling from inside/outside works fine.

After establishing the sip call there is only one-way audio from outside to the router/phone. No audio is send in the other direction (from the phone/router to the sip provider).

Configuration is attatched

Any idea where the problem is? Thanks for any help.

Regards, Frank

Everyone's tags (5)
1 ACCEPTED SOLUTION

Accepted Solutions

Re: one-way Audio with VOIP on Cisco 1861

Try removing the SIP bind source control/media commands.

HTH,

Chris

Sent from Cisco Technical Support iPhone App

7 REPLIES
Hall of Fame Super Gold

one-way Audio with VOIP on Cisco 1861

Wrong forum, post in "IP Telephony". You can move your posting using the Actions panel on the right.

one-way Audio with VOIP on Cisco 1861

Hello

can you please find the below configuration for your issue , i think you have to configure MTP

sccp local vlan 1

sccp ccm 10.10.10.1 identifier 1 version 7.0

sccp

!

sccp ccm group 1

bind interface vlan 1

associate ccm 1 priority 1

associate profile 1 register MOTMTP

dspfarm profile 1 mtp 

codec pass-through

codec g711ulaw

maximum sessions software 200

associate application SCCP

telephony-service

sdspfarm units 3

sdspfarm transcode sessions 8

sdspfarm tag 1 MOTMTP

Thank you

please rate all useful information

New Member

Re: one-way Audio with VOIP on Cisco 1861

Hello,

doesn't help. Problem is still the same. Attached the updated configuration

Regards, Frank

Re: one-way Audio with VOIP on Cisco 1861

Hi

Most of the time ip routing will be the problem of firewall which can stop RTP .Can you do a call and do "debug ccsip messages" and share with us?.

Please find the below:-

1-

I am sorry you have to do the below to enable the MTP on your router

dspfarm profile 1 mtp 

no shutdown

2-

voice service voip

sip

header-passing

Thanks

please rate all useful information

Re: one-way Audio with VOIP on Cisco 1861

Hi Frank.
Under sip-ua try to add
nat symmetric role active
nat symmetric check-media-src

HTH
Regards
Carlo

Sent from Cisco Technical Support iPhone App

Please rate all helpful posts "The more you help the more you learn"

Re: one-way Audio with VOIP on Cisco 1861

Try removing the SIP bind source control/media commands.

HTH,

Chris

Sent from Cisco Technical Support iPhone App

New Member

Re: one-way Audio with VOIP on Cisco 1861

Hi Chris,

it worked out well. Thank you so much.

Thanks to all others as well for helping

Best Regards, Frank

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