Newly installed CS 1000E 5.5 fully patched as of 5/1/09. In bound calls calling 800# hits thru-dial service in CP and caller enters extension number. Call goes thru fine but after about 55 seconds call drops everytime. Reprogrammed to ring extension bypassing CP and still dropped. 800# comes in via a LD T-1 and I don't think it's a T-1 issue because outbound traffic over same T-1 work fine. Anyone ever have this happen before and any ideas on what to check????
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CS 1000 E dropping calls
- Thread starter texan01
- Start date
Is this happening to all calls coming in on this T-1, or just calls to a particular DN?
If this is a PRI, have you checked the D-Channel messaging to see if anything strange is going on?
I would also take a look at your answer supervision settings on the route.
If this is a PRI, have you checked the D-Channel messaging to see if anything strange is going on?
I would also take a look at your answer supervision settings on the route.
- Thread starter
- #3
mjclothier
Vendor
Are you seeing any ERR/AUD/BUG on the treminal when the call drops?
Does it happen to a TDM resource on the same IPMG as the T-1 or only when it leaves the IPMG on a DSP?
Does the IPMG that the T-1 is in have a clock?
Does it happen to a TDM resource on the same IPMG as the T-1 or only when it leaves the IPMG on a DSP?
Does the IPMG that the T-1 is in have a clock?
Answer supervision set to no should not cause them to drop. If the calls are dropping relatively near the beginning of the call, I would suspect that the CO is not recognizing that the trunks have been answered, and are manually releasing the call.
You can try changing to Yes on a couple of the trunks, and then testing to see if calls to those stay up past the point that they have been dropping.
You can try changing to Yes on a couple of the trunks, and then testing to see if calls to those stay up past the point that they have been dropping.
- Thread starter
- #6
That's what I am going to try tomorrow. I think it's because the T-1 is in the main IPMG and all the digital and analog cards are in different IPMG's. Having a fax issue also, where faxes are dropping when they have to go from the IPMG with a PRI to an IPMG with the analog cards.
- Thread starter
- #8
mjclothier
Vendor
For the fax issue:
Trace a Fax call, verify the codec in use.
Also make sure the analog stations have FAXA in the CLS.
If you can hard code the fax machines to use 14,000 baud that may help as well..
Trace a Fax call, verify the codec in use.
Also make sure the analog stations have FAXA in the CLS.
If you can hard code the fax machines to use 14,000 baud that may help as well..
- Thread starter
- #10
From previous post ... not sure if it is your issue, but worth spending a few minutes checking your cables as it can cause random dropped calls.
Hello all. Just a helpful tip that we ran across recently while installing a new CS1000. The NTDK95 cables CE MUX and DX-30 (which run from the MG to expander and carry voice/data) are UNI-DIRECTIONAL. They have a little label on each cable that says if that end should attach to the expansion cabinet. We only had 3 right out of 8 and the Nortel notice just came out the end of last year or first part of 2008.
Please check your connections all! This can cause dropped calls and error messages on your switch. I am still trying to find out from Nortel what happens if you do install them backwards ... I will post that if I ever find out
BULLETIN ID: 2008008579, Rev 1
PUBLISHED: 2008-01-23
STATUS: Active
REGION: APAC
CALA
EMEA
GC
NA
PRIORITY: Information
TYPE: Alert
Background:
If the NTDK95 CE Mux cables, which are used between the Media Gateway and Media Expansion Cabinets, are installed
backwards, problems such as low audio, garbled transmission from IP to TDM phones, dropped calls and invalid card
responses can occur.
Analysis:
The NTDK95 cable is directional and must be installed correctly. The cable has a sticker indicating which end must be
attached to the expansion cabinet for proper instaltion.
Recommendations:
The NTDK95 CR MUX cable must be installed properly per the label on the cable.
The label on the cable states "TO EXP CAB"
Required Actions:
Installers should check for proper installation of the cable
PRODUCT RELEASE
Enterprise VoIP-Core-CS 1000E 04.50W
Enterprise VoIP-Core-CS 1000E 05.00W
Enterprise VoIP-Core-CS 1000E 05.50W
Hello all. Just a helpful tip that we ran across recently while installing a new CS1000. The NTDK95 cables CE MUX and DX-30 (which run from the MG to expander and carry voice/data) are UNI-DIRECTIONAL. They have a little label on each cable that says if that end should attach to the expansion cabinet. We only had 3 right out of 8 and the Nortel notice just came out the end of last year or first part of 2008.
Please check your connections all! This can cause dropped calls and error messages on your switch. I am still trying to find out from Nortel what happens if you do install them backwards ... I will post that if I ever find out
BULLETIN ID: 2008008579, Rev 1
PUBLISHED: 2008-01-23
STATUS: Active
REGION: APAC
CALA
EMEA
GC
NA
PRIORITY: Information
TYPE: Alert
Background:
If the NTDK95 CE Mux cables, which are used between the Media Gateway and Media Expansion Cabinets, are installed
backwards, problems such as low audio, garbled transmission from IP to TDM phones, dropped calls and invalid card
responses can occur.
Analysis:
The NTDK95 cable is directional and must be installed correctly. The cable has a sticker indicating which end must be
attached to the expansion cabinet for proper instaltion.
Recommendations:
The NTDK95 CR MUX cable must be installed properly per the label on the cable.
The label on the cable states "TO EXP CAB"
Required Actions:
Installers should check for proper installation of the cable
PRODUCT RELEASE
Enterprise VoIP-Core-CS 1000E 04.50W
Enterprise VoIP-Core-CS 1000E 05.00W
Enterprise VoIP-Core-CS 1000E 05.50W
- Status
