Re: ISDN modem connection vs CUCM

mandreano · ‎02-10-2011

Hi,

i swapped a Siemens against a CUCM8.5.

behind the Siemens, the customer had three ISDN modem devices. This devices are used to share files with supplier.

Now i need to connect this ISDN modem devices "through" the CUCM. Any ideas how to accomplish this?

The CUCM is conncted with a MGCP 2851 to the PSTN (6x BRI).

My idea. I migrate the MGCP to H323. Then i plug in more vic-bri-nt/te in the new H323 gateway.

The new bri interfaces configured as ISDN type network. And then i can redirect the ISDN modem connections with dial-peer.

Would this work?

thanks in advance

marco

ryabenne · ‎02-10-2011

Marco,

As long as you have a valid TCP connection back to the CUCM server this setup should work. Detailed CCM service logs will be able to show you if you are actually hitting the CUCM so that way it can proceed with the call setup and audio path.

Thanks,

Ryan

mandreano · ‎02-11-2011

Hi Ryan,

thanks for reply.

I tried this:

PSTN (Telco)

|

MGCP (with VIC2-2Bri-NT/TE)

|

CUCM8.5

|

H323 (with VIC2-2Bri-NT/TE)

|

ISDN Modem Device

If i connect a ISDN Phone to the H323 Gateway. Is works. I can receive and place calls to PSTN.

If i connect the ISDN Modem device it doesn't work.

Here the h323 configuration:

interface BRI0/0/0
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn send-alerting
isdn sending-complete
isdn skipsend-idverify
!
interface BRI0/0/1
no ip address

shutdown
isdn switch-type basic-net3
isdn point-to-point-setup
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.240.1
no ip http server
no ip http secure-server
!
!
!
control-plane
!
!
!
voice-port 0/0/0
compand-type a-law
cptone DE
!
voice-port 0/0/1
!
!
!
dial-peer voice 20 voip
preference 1
destination-pattern .T
progress_ind setup enable 3
voice-class codec 711
voice-class h323 1
session target ipv4:192.168.240.10
incoming called-number ....
dtmf-relay h245-alphanumeric
ip qos dscp cs5 media
no vad
!
dial-peer voice 21 voip
preference 2
destination-pattern .T
progress_ind setup enable 3
session target ipv4:192.168.240.10
incoming called-number ....
dtmf-relay h245-alphanumeric
codec g711ulaw
ip qos dscp cs5 media
no vad
!
dial-peer voice 10 pots
tone ringback alert-no-PI
preference 1
destination-pattern 59
direct-inward-dial
port 0/0/0
forward-digits all
!

best regards,

Marco

mandreano · ‎02-17-2011

Hi,

its solved, i have a working configuration: Perhaps this helps someone.

Network Diagram:

PSTN

|

H323 Gateway

| |

| |_ISDN Router

|

CUCM

Configuration H323 Gateway:

interface BRI0/0/0
description --- ISDN Router ---
no ip address
isdn switch-type basic-net3
isdn overlap-receiving
isdn protocol-emulate network
isdn layer1-emulate network
isdn incoming-voice voice
isdn send-alerting
isdn sending-complete
isdn skipsend-idverify

interface BRI0/1/0
descriptioin --- PSTN ---
no ip address
no ip redirects
no ip unreachables
no ip proxy-arp
isdn switch-type basic-net3
isdn overlap-receiving
isdn tei-negotiation first-call
isdn point-to-point-setup
isdn incoming-voice voice
isdn send-alerting
isdn sending-complete
isdn static-tei 0
isdn skipsend-idverify

voice-port 0/0/0
translation-profile incoming 2
no vad
compand-type a-law
no comfort-noise
cptone DE
timeouts interdigit 2
description --- ISDN Router ---
bearer-cap Speech

dial-peer voice 10 pots
tone ringback alert-no-PI
description --- ISDN Router---
preference 1
destination-pattern XXXXXX
direct-inward-dial
port 0/0/0
forward-digits all

dial-peer voice 1 pots
tone ringback alert-no-PI

description --- PSTN ---
preference 1
destination-pattern .T
direct-inward-dial
port 0/1/0
forward-digits all
!
dial-peer voice 20 voip
description --- CUCM ---
preference 1
destination-pattern XXXT
progress_ind setup enable 3
session target ipv4:192.168.240.10
incoming called-number ....
voice-class codec 711
voice-class h323 1
dtmf-relay h245-alphanumeric
no fax-relay sg3-to-g3
fax rate 14400
fax protocol pass-through g711alaw
ip qos dscp cs5 media
no vad

best regards,

marco