Configuring 1- and 2-Port T1/E1 Multiflex Voice/WAN ... - docs.mind.ru

Configuration Examples
Keep the following considerations in mind:
• Drop and Insert works only between ports on the same Multiflex VWIC.
• The VWIC can either be in a standalone WIC slot on a Cisco 2600 series router, integrated into
a Digital T1 Packet Voice Trunk Network Module VWIC slot, or installed in a Cisco 3600 series
2-port network module (NM-1E2W, NM-2E2W, NM-1E1R2W).
• When the VWIC module is installed in the VWIC slot of a Digital T1 Packet Voice Trunk
Network Module, the T1 ports do not provide WAN connectivity (for example. Frame-Relay,
PPP, and so on) in addition to voice and Drop and Insert.
• WAN and Drop-and-Insert capabilities are supported when the VWIC is in a chassis WIC slot on
a Cisco 2600 series router.
Drop and Insert with VoIP and PSTN Services
Figure 2
Sample Configuration: Drop and Insert with VoIP and PSTN Services
PSTN
T1 1 T1 1
PBX
T1 0 IP Network
T1 0
RTR-A
RTR-B
PBX
26716
Some PBX DS0s are used for PSTN services,
while others are sent to the router for VoIP calls.
This example in this section shows configuration for Drop and Insert when a 2-port Multiflex VWIC
is installed in a Digital T1 Packet Voice Trunk Network Module VWIC slot and VoIP is configured.
WAN connections must be provided by separate links.
22 Cisco IOS Release 12.0(7)T