DBL Technology Co., Ltd.
GoIP User Manual
www.dbltek.com
Technical Support: [email protected]
21
Net Protocol
Encryption Key
SIM Data Format
This Specifies the network protocol (UDP or TCP) is used for Remote SIM communications.
This specifies the encryption key used for the SIM data communications between the SIM
Server and the GoIP. You need to enable the encryption option and enter the same key in
the SIM Server as well.
SIM data communication can use Long Command or Short Command. The default for the
GSM module is to use the Long Command since it allows faster network registration.
However, it is found that Short Command is required in order to make the Remote SIM
function to work. Please try the Short Command format if you have troubles to get the
Remote SIM to work properly.
TCP
Long Command
12.
SMPP SMSC
ID
Password
Port
This parameter enables the GoIP to act as a SMPP SMSC (Short Message Service
Center). The SMPP Client must use the ID, Password, and the Port number
specified.
SMPP Client ID
SMPP Client Password
Port used for SMPP protocol
7777
13.
DTMF Tone
Min Gap (200 -
400)
This parameter specifies the maximum dropout time for a DTMF tone.
When making a call from SIP to GSM or
from GSM to SIP by using the second dial
method, the device needs to detect the
dialing digits from the DTMF tones
received via the voice data stream.
Depending on the network conditions, short dropouts may occur due to packet
jitter / loss. Therefore, DTMF digit may be detected more than once if these
dropouts are not taken into account. Consequently, the call is dialed to an
incorrect number. To avoid this problem, a dropout window is used to avoid
false detection when dropouts occur. During this window, the same DTMF digit
is not recognized more than once.
The range of the dropout window is specified in terms of packet timestamp value.
The smaller the value is, the smaller the dropout
window is. This increase the
chance of detecting the same digit twice or more. However, if the value is set
too large, there is a possibility that the next digit is missed.
270
5.3.2 Network
Proper network environment is the key to insure the voice call performance of the device. In general, Intranet
offers a more stable network environment than Internet and it is the preferred network to be used. If Internet
is going to be used, please make sure that the network can offer low packet loss, small packet jitter and low
packet delay. Each voice channel requires less than 90 kbps when A-law or
-law voice codec is used. A
GoIP-8 will require 8 times this bandwidth. Therefore, it is very important to make that both upstream and
downstream have enough bandwidth (+ 30% headroom) in order to accommodate the data traffics for the
device installed when all lines are used simultaneously.
In order to get external network access, the LAN port must be configured according to the network environment