DWG2000-8G User Manual
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Dinstar Technologies Co., Ltd.
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5.6 voice single-pass, double-barrier or poor quality
1) Make sure the equipment is working properly with grounded power
2) Check the device network connection is in working status
3) Ask network administrators to open limitation with the equipment’s network communications
(it is a special equipment, not afraid of virus attacks); (2) try to enable the equipment tunnel
(through the WEB for Configuration, Also, please NOTE, open the tunnel will impact voice
quality, Please do not enable the tunnel as far as possible, refer WEB Configuration Interface
Description section)
4) Make sure the LAN equipment is working, user can try to restart the gateway or router to solve
the problem
5) Check whether there is more than one DINSTAR series products in LAN network: some
gateways or routers, processing network packet is vulnerable (for example, to multiple network
devices or the same protocol network communication, NAT allocated the same conversion
communications Channel). If there is such a case, suggest replacing a router or specify each voice
gateway with different LOCAL RTP PORT Channel (refer to the base WEB Configuration
interface section)
6) Check the equipment network environment for the softswitch platform, monitor the network
condiation, make sure the network is solid
6. Glossary
GSM: Global System for Mobile Communications
CDMA: Code Division Multiple Access
FMC: Fixed Mobile Convergence
SIP: Session Initiation Protocol
MGCP: Media Gateway Control Protocol
DTMF: Dual Tone Multi Frequency
USSD: Unstructured Supplementary Service Data
PSTN
：
Public Switched Telephone Network
STUN: Simple Traversal of UDP over NAT
IVR: Interactive Voice Response
IMSI: International Mobile Subscriber Identification Number
IMEI: International Mobile Equipment Identity
DMZ: Demilitarized Zone
VoIPon www.voipon.co.uk [email protected] Tel: +44 (0)1245 808195 Fax: +44 (0)1245 808299
