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SIP Gateway to PSTN config?

sardarzandieh
Level 1
Level 1

Hi Everyone

I currently have a h323 gateway which is connected to PSTN via  a PRI.

because of cost savings , we are canceling the PRIs and getting a SIP trunk.

how do i go about configuring the SIP trunk into the IOS to conenct to PSTN?

anyone has any sample configs that i can take a look at?

for the H323 and PRI, i always have the Serial interface with the ESF and B8ZS and so on.

how do i go about configuring the SIP for PSTN access?

any help is greatly appricaited.

1 Accepted Solution
4 Replies 4

hrnaqvi12
Level 1
Level 1

You need an IOS of IP to IP Gateway for your router.

You just need to configure and allow connection of sip to h323 and vice versa in , " voice service voip " , and configure inbount/outbound dial peers.

Scott Brien
Level 1
Level 1

Hi,

You will need an IP-IP gateway as stated above

Please see below sample configuration which i beleive to be relevant to your situation

voice service voip

media flow-around

allow-connections h323 to sip

allow-connections sip to h323

voice class codec 99

codec preference 1 g711alaw

codec preference 2 g711ulaw

voice class h323 1

  h225 timeout tcp establish 3

  call preserve

sccp local GigabitEthernet0/0

sccp ccm X.X.X.X identifier 2 version 7.0

sccp ccm X.X.X.X identifier 1 version 7.0

sccp ip precedence 3

sccp

!

sccp ccm group 1

bind interface GigabitEthernet0/0

associate ccm 1 priority 1

associate ccm 2 priority 2

associate profile 2 register XCODE

associate profile 1 register MTP

!

dspfarm profile 1 mtp

codec g711ulaw

maximum sessions software 100

associate application SCCP

dial-peer voice 2 voip

description *INBOUND FROM SP*

media flow-around

session protocol sipv2

incoming called-number .

voice-class sip asserted-id pai

dtmf-relay rtp-nte

codec g711ulaw

no vad

!

dial-peer voice 10 voip ** Outbound dial-peer to SIP Trunk

description -- Outbound to SP

translation-profile outgoing egressTranslation

destination-pattern 0T

session protocol sipv2

session target ipv4:X.X.X.X

codec g711ulaw

voice-class sip asymmetric payload dynamic-codecs

voice-class sip asserted-id pai

voice-class sip early-offer forced

voice-class sip error-code-override options-keepalive failure 500

dtmf-relay rtp-nte

no vad

dial-peer voice 201 voip ** customers DiD range to IPPBX

destination-pattern XXXXXXXXXX

media flow-around

codec g711ulaw

voice-class h323 1

session target ipv4:X.X.X.X

dtmf-relay h245-alphanumeric

no vad

This is a cutdown version of an IP-IP gateway however i hope it to be a good starting point for you.

Scott

Thanks for hte Help Scott

Sorry for the late response.

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