Specifications

MyPBX U5XX Administrator's Guide
www.yeastar.com Page 62
·NSF
Used with AT&T PRIs. If outbound calls are being rejected due to "Mandatory
information element missing" and the missing IE is 0x20, then you need this
setting.
·CRC
CRC Verification.
·Codec
Default ,A-Law,U-Law.
·Echo Cancellation
Echo cancel Obviously this disables or enables echo cancellation, it is
recommended to not turn this off.
1) CallerID Prefix
·International Prefix
When there are international calls coming in via this BRI trunk, the International
Prefix you have set here will be added before the CID. So you can know this is
an international call before you answer it.
·National Prefix
When there are national calls coming in via this BRI trunk, the National Prefix
you have set here will be added before the CID. So you can know this is a
national call before you answer it.
·Local Prefix
When there are Local calls coming in via this BRI trunk, the Local Prefix you have
set here will be added before the CID. So you can know this is a local call before
you answer it.
·Private Prefix
When there are Private calls coming in via this BRI trunk, the Private Prefix you
have set here will be added before the CID. So you can know this is a Private call
before you answer it.
·Unknown Prefix
When there are calls with unknown number coming via this BRI trunk, the
Unknown Prefix you set here will be shown as the caller ID.