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IP trunk (drop connections)

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jasiek

Vendor
Apr 12, 2002
48
PL
We have a two Definity (One is G3V9, second MV1.1.)connected through WAN network based on Cicco routers.
Calls beetwen systems are very often dropped.

What could be a reason for it?

Definity Settings (booth side is similar).
IP Network Region

Region: 3
Name:
Audio Parameters
Codec Set: 1

UDP Port Range
Min: 2048
Max: 3028

DiffServ PHB Value: 46 Direct IP-IP Audio Connections? y
IP Audio Hairpinning? y
802.1p/Q Enabled? n



change ip-codec-set 1 Page 1 of 1

IP Codec Set

Codec Set: 1

Audio Silence Frames Packet
Codec Suppression Per Pkt Size(ms)
1: G.711A n 2 20
2: G.729 n 2 20
3:
4:
5:







Command successfully completed
Command:
change trunk-group 40 Page 1 of 10
TRUNK GROUP

Group Number: 40 Group Type: isdn CDR Reports: n
Group Name: Siec IP COR: 22 TN: 1 TAC: 340
Direction: two-way Outgoing Display? n Carrier Medium: IP
Dial Access? n Busy Threshold: 99 Night Service:
Queue Length: 0
Service Type: tie Auth Code? n TestCall ITC: rest
Far End Test Line No:
TestCall BCC: 4
TRUNK PARAMETERS
Codeset to Send Display: 6 Codeset to Send National IEs: 6
Max Message Size to Send: 260
Supplementary Service Protocol: e Digit Handling (in/out): enbloc/enbloc

Trunk Hunt: cyclical
Digital Loss Group: 13
Calling Number - Delete: Insert: Numbering Format:
Bit Rate: 1200 Synchronization: async Duplex: full
Disconnect Supervision - In? y Out? n
Answer Supervision Timeout: 0


change trunk-group 40 Page 2 of 10
TRUNK FEATURES
ACA Assignment? n Measured: none Wideband Support? n
Internal Alert? n Maintenance Tests? y
Data Restriction? n NCA-TSC Trunk Member:
Send Name: y Send Calling Number: y
Used for DCS? y PBX ID: 1
Suppress # Outpulsing? n Numbering Format: public DCS Signaling: d-chan
Outgoing Channel ID Encoding: exclusive UUI IE Treatment: service-provider

Replace Restricted Numbers? n
Replace Unavailable Numbers? n
Send Connected Number: y


Send UCID? n
Send Codeset 6/7 LAI IE? y

Path Replacement with Retention? n
Path Replacement Method: better-route
Network (Japan) Needs Connect Before Disconnect? n



change trunk-group 40 Page 3 of 10
INCOMING CALL HANDLING TREATMENT
Service/ Called Called Del Insert Per Call Night
Feature Len Number CPN/BN Serv








change trunk-group 40 Page 4 of 10
TRUNK GROUP
Administered Members (min/max): 1/10
GROUP MEMBER ASSIGNMENTS Total Administered Members: 10

Port Code Sfx Name Night Sig Grp
1: T00099 4
2: T00100 4
3: T00101 4
4: T00102 4
5: T00103 4
6: T00104 4
7: T00105 4
8: T00106 4
9: T00107 4
10: T00108 4
11:
12:
13:
14:
15:



change signaling-group 4 Page 1 of 5
SIGNALING GROUP

Group Number: 4 Group Type: h.323
Remote Office? n Max number of NCA TSC: 0
Max number of CA TSC: 0
Trunk Group for NCA TSC:
Trunk Group for Channel Selection:
Supplementary Service Protocol: a


Near-end Node Name: c-lan Far-end Node Name: clanwarsz
Near-end Listen Port: 1720 Far-end Listen Port: 1720
Far-end Network Region:
LRQ Required? n Calls Share IP Signaling Connection? n
RRQ Required? n
Bypass If IP Threshold Exceeded? n

Direct IP-IP Audio Connections? y
IP Audio Hairpinning? y
Interworking Message: PROGress

 
The configuration looks good overall.. I would turn on the option "calls share the IP signaling connection" What codec are you looking to run over the WAN? G729 or G711?? You need to put G729 first if thats what you want to run.. You might make the packet size 1 step higher.. Fill in the
"Trunk Group for Channel Selection" field (probably doesn't make a difference, but it can't hurt)

Also what version of firmware are you running on the clan and medpro cards?

Make sure those are the latest.. I'd also make sure that you don't have any ethernet issues (link negotiation errors, etc..)


BuckWeet
 
I will check the settings. I have a C-LAN board TN799C (it has not possibility to download firmware software). Can be problem with that?

Jan
 
I use TN799c's in my network, they work fine... I'd look at the Medpro boards, if those are looking okay, start checking into the ethernet switch ports they're hooked too, look for errors, then start checking your router and make sure the proper QoS is assigned...


BuckWeet
 
What you mean proper QoS? (on router?). Where can I find documents about QoS on WAN Network?

Jan
 
Tell me what kind/model of routers you have, what kind of WAN link, how much bandwidth, etc...

BuckWeet
 
The routers are Cisco 2611 on both sides, voice is transported through 256kB reserved bandwitch ATM network.

JZ

 
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