Grandstream UCM6510 User Manual - Manual (Page 153)

Firmware Version 1.0.2.5 UCM6510 IP PBX User Manual Page 152 of 313
ITU and MFC/R2 standards in different countries or regions including
Argentina, Brazil, China, Czech Republic, Colombia, Ecuador, Indonesia,
Mexico, the Philippines and Venezuela.
Get ANI First
If enabled, the callee side will request the caller to send caller number first
and then called number.
Note:
Options "Get ANI First" and "Skip Category" cannot be enabled at the
same time.
Category
Select the category of the caller. UCM6510 supports four categories:
National Subscriber, National Priority Subscriber, International Subscriber
and International Priority Subscriber.
LBO
The line build-out (LBO) is the distance between the operators and the
PBX. Please use the default value 0dB unless the distance is long.
RX Gain
Configure the RX gain for the receiving channel of digital port. The valid
range is from -24dB to +12dB.
TX Gain
Configure the TX Gain for the transmitting channel of digital port. The valid
range is -24dB to +12dB.
Play Local RBT
This configured whether to play the ringback tone from local UCM6510 or
not. If enabled, the local UCM6510 will play ringback tone to the caller.
Otherwise, the caller will listen to the tone from peer device. The default
setting is disabled.
Advanced Settings
Coding Select "HDB3" or "AMI".
CRC Select whether to use CRC4 or not.
MF Back Timeout (ms)
MFC/R2 value in milliseconds for MF timeout. Values smaller than 500ms
are not recommended. -1 represents default value.
Metering Pulse Timeout (ms)
MFC/R2 value in milliseconds for the metering pulse timeout. Metering
pulse is sent by some telcos for some R2 variants during a call presumably
for billing purposes to indicate costs. Should not last more than 500ms, -1
represents default value, and for Argentina the default value is 400ms, for
others is 0ms.
Alllow Collect Calls
Brazil has a special calling party category for collect calls (llamadas por
cobrar) instead of using the operator (as in Mexico). The R2 spec in Brazil
says a special GB tone should be used to reject collect calls.
By default, this is disabled, which means collect calls will be blocked.
Double Answer Some PBXs require a double-answer process to block collect calls. If users