Video on ISR 2800 3800 H.320 GW with ISO 13871 bonding Configuration Example
This is the basic config for any ISR router 2800 / 3800 series with PRI connection to PSTN / PBX and H.323 protocol on IP side.
The example toplogy:
Tandberg VT - E1 PRI - PSTN - E1 PRI - ISR router - H.323 GK - Tandberg VT
1. First we need to register GW and the video endpoint to the GK, we can run GK feature on the same router if we have IOS with GK feature for example - C2800NM-IPVOICE_IVS-M. The most simple setup will be if we register endpoing with full E164 number and GW with the tech prefix, chousen in a way it will allow dialing to PSTN without any number transformation. Assume PSTN will requre 00 for international call, in this case we can use the following config on GK:
gatekeeper zone local video-98 mappets.com 10.52.218.98 no use-proxy video-98 default inbound-to terminal no use-proxy video-98 default outbound-from terminal no shutdown
There is no need to configure zone prefixes as GW will register with the tech prefix. And VT will register with the full E164 number, so GK will always be able to resolve the them to IP. For VT we need to allow direct calls to / from H.323 GW, so we disabling proxy requirement.
The matching GW config will be:
voice service voip h323 emptycapability h225 h245-address on-connect call start slow h245 tunnel disable h245 timeout olc 30
Formally you will need only slow start and OLC timeout tuning. Because it may take some time for all ISDN secondary calls to get connected and for the BAS and codec negotiation to start, we need allow voip side to wait for some time. The 30 second timeout is reasonable setting, if we are talking about some VT like Tandberg or Polycom, they will have that settings by default. But if you have CallManager on IP side, you need to tune that timeouts via Service parameters:
H245 TCS Timeout 30
Media Exchange Interface Capability Timer 30
Media Exchange Timer 30
You may also consider to un-check the check-box on the GW config page:
"Wait for Far End H.245 Terminal Capability Set"
It usually good practice explicitly specify which interface will be used for H.323 signaling and if you register the GW to GK you will need to configure:
interface FastEthernet0/0 ip address 10.52.218.91 255.255.255.0 h323-gateway voip interface h323-gateway voip id video-98 ipaddr 10.52.218.98 1719 h323-gateway voip h323-id ios-91-to-98 h323-gateway voip tech-prefix 00 h323-gateway voip bind srcaddr 10.52.218.91
Next we can proceed with the H.320 video GW configuration.
1. Specify the card type you will have:
card type e1 1 1
2. As video calls are actually the DATA calls by the nature of video content, we need to ensure the clocking is configured corectcly:
network-clock-participate slot 1 network-clock-participate wic 1
! ! Choose the one which required by your hardware setup. !
network-clock-select 1 E1 1/0
3. You will need to specify the ISDN switch type before you can proceed with PRI group config on the controller:
isdn switch-type primary-net5
4. The controller config is the same as for any PRI connection:
controller E1 1/0 pri-group timeslots 1-31 description >>>>> Test of NEW BT PRI ports - out 338898 *** <<<<<
5. Now we need to configure D-channel to accept / send Data calls:
interface Serial1/0:15 description >>>>> Test of NEW BT PRI ports - out 338898 *** <<<<< no ip address encapsulation hdlc isdn switch-type primary-net5 isdn map address .* plan unknown type unknown isdn negotiate-bchan resend-setup isdn bchan-number-order ascending isdn sending-complete isdn integrate calltype all no cdp enable
6. Now we can proceed with the preparation for the dial-peer config, first let define the codecs we will use on IP side. Please keep in mind that GW will actually do the filtering of the codes it will announce to the endpoints on both sides.
voice class codec 1000 codec preference 1 g711ulaw codec preference 2 g711alaw codec preference 3 g728 codec preference 4 g722-64 codec preference 5 g722-56 codec preference 6 g722-48 video codec h261 video codec h263 video codec h263+ video codec h264
7. This part is required to accept the incoming video calls, we need to have to provide the secondary numbers to the calling party, so they can call us on that numbers to add more bandwidth to the video call, that numbers will be sent out during ISO 13871 bonding stage. According to ISO 13871 only 7 digits will be sent. So there is no need or sense to configure more then 7 digits in the pool config. But you can configure less then 7 digits. The secondary called number will be crated from the primary called number by replacing the last digits with the numbers from the pool. So in case when only last 1 or 2 digits are different, you pool may have only 1 or 2 digit numbers in it.
voice class called number pool 3151 index 1 315140 - 315149
8. Now we need to apply that pool to the voice port to activate it:
voice-port 1/0:15 voice-class called-number-pool 3151
9. Now we are ready to proceed with the dial-peer configuration we need 4 of them, two incoming and two outgoing. It is possible to use one POTS dial-peer as incoming and outgoing at the same time, but we will provide config for two of them for the sake of clarity:
dial-peer voice 99 pots description default incoming video dial-peer information-type video incoming called-number 313300 bandwidth maximum 384 direct-inward-dial
dial-peer voice 9001 pots description default outgoing video dial-peer destination-pattern 00 information-type video bandwidth maximum 384 port 1/0:15 forward-digits all
10. here is the example of the VOIP dial-peer, now we configured it as both - incoming and outgoing:
dial-peer voice 770 voip description default incoming/outgoing voip dial-peer for all calls from GK w destination-pattern 701... voice-class codec 1000 session target ras incoming called-number 00. dtmf-relay h245-alphanumeric
Related show Commands
This section provides information you can use to confirm your configuration is working properly.
Certain show commands are supported by the Output Interpreter Tool (registered customers only), which allows you to view an analysis of show command output.
show network-clocks show isdn status show dial-peer voice summary show voice call status show voice dsp
There also some useful commands to add and they can be used on All routers in production as well:
service nagle service tcp-keepalives-in service tcp-keepalives-out service timestamps debug datetime msec service timestamps log datetime msec
logging message-counter syslog logging queue-limit 100000 logging buffered 5000000 logging rate-limit 10000 no logging console
And some very useful aliases :)
alias exec c conf t alias exec r sh run alias exec i sh ip ro alias exec ib sh ip int brie alias exec gs show run | s gatekeeper alias exec ge sho gatekeeper end alias exec sg sho gatekeeper alias exec rs sh run | s alias exec ri sh run | i alias exec rb sh run | b alias exec dp sh run | be dial-p
In case you will need to contact TAC, you can get the debugs following this template:
- 1. Add to the config or make sure you have it already:
service sequence-numbers service timestamps debug datetime msec service timestamps log datetime msec ! logging buffered 5000000 logging rate-limit 10000 logging queue-limit 100000 no logging console
- 2. Then start logging to a file from your telnet application and get:
U all Term no mon Term len 0 ! Sh ver Sh run
- 3. Then enable debugs (you can copy / paste all of them to the telnet session window )
Deb voip ccapi inout Deb isdn q931 Deb h225 q931 Deb h225 asn1 Deb h245 asn1 Deb cch323 h245 deb voip tsp dialpeer deb voip h221 raw decode
Sh deb Term no mon
Clear log before placing call:
Then place the call and get content of the buffer as:
Please send the log in simple TXT format attached to the e-mail in simple TXT format with extension".TXT". Please include email@example.com in CC to get logs and e-mail attached to case notes.
Add show running config of your device