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New Member

SIP provider with Call Manager 3.2, 3725 GW

I have a customer with Call Manager 3.2 and a 3725 GW. The customer wants to start using a SIP provider. The network is currently set up H.323 entirely. Do I need IP-to-IP multiservice IOS version in order to make this work? Thanks.

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Accepted Solutions

Re: SIP provider with Call Manager 3.2, 3725 GW

Duh!

I forgot that you are running CM 3.2 You may not have that option. Not sure if there is a service parameter equivalent to this.

Gateways default to faststart for H323, can you check whether you have an Inbound Fastart option under gateway.

14 REPLIES
Green

Re: SIP provider with Call Manager 3.2, 3725 GW

Yes, you need IP-to-IP GW feature since CCM 3.2 doesnt support SIP.

New Member

Re: SIP provider with Call Manager 3.2, 3725 GW

I got outbound calls working with 12.4.10 IP VOICE. File name is c3725-ipvoicek9-mz.124-10. Relevant config looks like this:

voice service voip

allow-connections h323 to sip

allow-connections sip to h323

h323

sip

bind control source-interface Multilink1

bind media source-interface Multilink1

!

translation-rule 1

Rule 0 ^71 1

!

dial-peer voice 200 voip

service session

destination-pattern 7T

translate-outgoing called 1

session protocol sipv2

session target ipv4:172.20.100.6

incoming called-number

dtmf-relay rtp-nte h245-alphanumeric

codec g711ulaw

!

dial-peer voice 210 voip

destination-pattern

progress_ind setup enable 3

session target ipv4:10.10.253.238

dtmf-relay h245-alphanumeric

codec g711ulaw

!

sip-ua

sip-server ipv4:172.20.100.6

!

sh call active voice br shows the following:

Telephony call-legs: 0

SIP call-legs: 1

H323 call-legs: 1

Call agent controlled call-legs: 0

SCCP call-legs: 0

Multicast call-legs: 0

Total call-legs: 2

1287 : 90 7568810ms.1 +-1 pid:100 Answer connecting

dur 00:00:00 tx:0/0 rx:0/0

IP 172.20.100.6:10056 SRTP: off rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711u

law

media inactive detected:n media contrl rcvd:n/a timestamp:n/a

1287 : 93 7591320ms.1 +-1 pid:110 Originate connecting

dur 00:00:00 tx:0/0 rx:0/0

IP 0.0.0.0:0 SRTP: off rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g729r8 pre-iet

f

media inactive detected:n media contrl rcvd:n/a timestamp:n/a

Telephony call-legs: 0

SIP call-legs: 1

H323 call-legs: 1

Call agent controlled call-legs: 0

SCCP call-legs: 0

Multicast call-legs: 0

Total call-legs: 2

Incoming calls however do not work. Here are the symptoms. When an outside caller dials the number, the outside caller hears ringback indefinitely, regardless if the user picks up the handset or not. When the SCCP IP phone user picks up, user hears dead air for a few seconds and then fast busy.

Codec on the H.323 leg shows G.729r8. Very strange since I specified in the dial peer G.711ulaw and both the gateway and the phone are in the same device pool and region and are configured to use G.711 within the region.

I assume that the call is failing due to a codec mismatch...

Help...

Re: SIP provider with Call Manager 3.2, 3725 GW

Can you do a codec g729r8 on both legs and see if the call works ? (Just to test)

New Member

Re: SIP provider with Call Manager 3.2, 3725 GW

The provider claims that they can only support G.711... Pretty lame if you ask me but, they are in the business of selling bandwidth.

Re: SIP provider with Call Manager 3.2, 3725 GW

Seth,

Have you confiugred the router as a gateway or a ICT trunk in Callmanager ? Can you uncheck the option, "Wait for far end H245 capabalities" option under the trunk or gateway and see what happens ? Make sure reset the trunk after you update this setting.

Sankar.

PS: please remember to rate posts!

New Member

Re: SIP provider with Call Manager 3.2, 3725 GW

It is configured as a gateway in Call Manager.

I don't see that option to uncheck...

Re: SIP provider with Call Manager 3.2, 3725 GW

Duh!

I forgot that you are running CM 3.2 You may not have that option. Not sure if there is a service parameter equivalent to this.

Gateways default to faststart for H323, can you check whether you have an Inbound Fastart option under gateway.

New Member

Re: SIP provider with Call Manager 3.2, 3725 GW

I could not find an equivalent service parameter nor an inbound option on the gateway configuration...

New Member

Re: SIP provider with Call Manager 3.2, 3725 GW

Shanky,

Oh Joy... I found it. It works now. Just for the record I set the Call Manager Service Parameter 'H323FastStartInbound' to True and all calls are completing successfully.

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