LV switch IPPBX3000, Руководство пользователя

Страница: 148 / 195

LvSwitch IPPBX 3000 Manual
146
The "Usage Situation " interface is described as follows:
Table 6-52 PCM Settings - Usage Situation
name Function Description
Enable
Default is not enabled
。
When you need to use this interface, enable the
cable after docking
。
If the interface is not enabled and is only enabled on the
NMS, a fault alarm will be generated.
。
Channel rate
Select and set the slot rate
。
Optional 56kb/s, 64kb/s, default value
"64kb/s"
。
clock
External clock / internal clock
，
Default "external clock"
。
An external clock
is generally used when accessing the PSTN
。
When the upper-level office is
not connected, but only the lower-level office is connected, when the clock
refers to the local office, all clocks are internal clocks.
。
In general, an
external clock must be used to interface with the higher-level office.
frame
Optional CCS when PCM is E1(Common Channel Signaling)
，
CAS(Column Address Strobe)
，
Default "CCS"
。
Where PRI or SS7 relay uses "CCS"
，
R2 trunk uses "CAS"
。
Optional D4 for T1
，
ESF(Extended Super Frame)
，
Default "ESF"
。
This parameter must be negotiated with the peer.
。
Both parties must be
identical in interface parameters.
，
Inconsistent due to individual
characteristic parameters
，
No warnings on the indicator or alarm station
，
But it will cause data channel failure, error code, slip code, out of
synchronization, etc
。
Line coding
Optional AMI when PCM is E1(Alternate Mark Inversion)
，
HDB3(High-density Bipolar Three)
，
Default "HDB3"
。
Optional AMI for T1
，
B8ZS(Bipolar 8 Zeros Substitution)
，
Default
"B8ZS"
。
This parameter must be negotiated with the peer.
Line output
This parameter is used to adjust the signal strength
，
Optional is
0/-7.5/-15/-22.5 dB
，
Default "0dB"
，
In general, you can use the default
value.
。
CRC Verify
Default not verified
。
This parameter must be negotiated with the peer
device.
。
<Channel mapping table> tag
Select the Channel Map Table tab
，
As shown in Figure 6-131
，
Channel maps can view and edit the
purpose of each channel
。
In some cases, the user divides the channels in E1/T1 into data channels and voice
channels
。