Juniper Networks J2320 사용자 설명서
port has two B-channels plus a D-channel. Up to two TIM521s (with 4 BRI trunk ports
each) can be installed in any of the slots on the Services Router.
each) can be installed in any of the slots on the Services Router.
Figure 44: TIM521 BRI Telephony Interface Module
For ISDN BRI trunking, the TIM521 supports up to four BRI interfaces to the central
office at the ISDN T reference point. Information is communicated on each port in
two ways:
office at the ISDN T reference point. Information is communicated on each port in
two ways:
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Over two 64-Kbps B-channels, called B1 and B2, that can be circuit-switched
simultaneously
simultaneously
NOTE: The TIM521 does not support BRI stations or combining both B-channels
together to form a 128-Kbps channel.
together to form a 128-Kbps channel.
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Over a 16-Kbps channel, called the D-channel, that is used for signaling. The
TIM521 occupies one time slot for all four D-channels
TIM521 occupies one time slot for all four D-channels
The circuit-switched connections have an a-law or mu-law option for voice operation.
The circuit-switched connections operate as 64-Kbps clear channels transmitting
data.
The circuit-switched connections operate as 64-Kbps clear channels transmitting
data.
To install or remove an Avaya VoIP module, see “Replacing a PIM” on page 174.
TIM521 LEDs indicate link status and activity. Table 41 on page 76 describes the
meaning of the LEDs.
meaning of the LEDs.
Table 41: LEDs for TIM521
Description
State
Color
Label
Alarm. A TIM521 failure requires
monitoring or maintenance.
monitoring or maintenance.
On steadily
Red
ALM
Active. A trunk connected to the
TIM521 is in use.
TIM521 is in use.
On steadily
Yellow
ACT
76
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Avaya VoIP Modules
J2320, J2350, J4350, and J6350 Services Router Getting Started Guide