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This topic describes the unified gateway connection scenario and data plan in a multi-node centralized call management network for the unified gateway two-node cluster.
Configuration Scenario
Configure data to implement the following objectives:
ϒ⁄Intra-office calls can be made by dialing short numbers between IP phones, POTS phones, and fax machines at the headquarters, branch 1, and branch 2.
ϒ⁄Incoming and outgoing calls can be made after the active node is connected to local nodes through SIP trunks and after local nodes are connected to the PSTN through PRA trunks.
ϒ⁄The active and standby unified gateway nodes can work in active/standby mode. When the active node is faulty, the standby node can take over users' service requests.
Data Plan
Table 1 IP addresses
Location |
NE |
IP Address |
Subnet Mask |
Gateway IP Address |
Headquarters |
Trunk gateway |
10.10.10.2 |
255.255.255.0 |
10.10.10.1 |
Active node |
10.10.10.5 |
255.255.255.0 |
10.10.10.1 |
|
Standby node |
10.10.10.6 |
255.255.255.0 |
10.10.10.1 |
|
Branch 1 |
Local node 1 |
192.168.1.2 |
255.255.255.0 |
192.168.1.1 |
Branch 2 |
Local node 2 |
172.16.1.2 |
255.255.255.0 |
172.16.1.1 |
Table 2 User numbers
Location |
Connected Endpoint |
Short Number |
Long Number |
User Rights Level |
Headquarters |
IP phone |
81000 |
28881000 |
Default rights |
IAD (fax machine) |
82000 |
- |
||
IAD (POTS phone) |
82001 |
- |
||
Automatic switchboard access code |
- |
28882999 |
||
Branch 1 |
IP phone |
83000 |
28883000 |
|
IAD (fax machine) |
84000 |
28884000 |
||
IAD (POTS phone) |
84001 |
28884001 |
||
Fax machine |
85000 |
- |
||
POTS phone |
85001 |
- |
||
Automatic switchboard access code |
- |
28885999 |
||
Branch 2 |
IP phone |
86000 |
28886000 |
|
IAD (fax machine) |
87000 |
28887000 |
||
IAD (POTS phone) |
87001 |
28887001 |
||
Fax machine |
88000 |
- |
||
POTS phone |
88001 |
- |
||
Automatic switchboard access code |
- |
28888999 |
- |
Table 3 SIP trunks
Location |
NE |
Peer Office |
Trunk Type |
Office Route Selection Code |
Office Route |
Headquarters |
Active node |
Local node 1 |
SIP |
1 |
1 |
Local node 2 |
SIP |
2 |
2 |
||
Trunk gateway |
SIP |
3 |
3 |
||
Trunk gateway |
Active node |
SIP |
1 |
1 |
|
Standby node |
SIP |
1 |
2 |
||
Branch 1 |
Local node 1 |
Active node |
ϒ⁄After the active and standby nodes are added, the system automatically creates the SIP trunks, office route selection codes, and office routes for the active and standby nodes. ϒ⁄If the U1980 functions as the local node, you need to manually create the SIP trunk, office route, and office route selection code in versions earlier than V200R003C20SPC200; in V200R003C20SPC200 and later versions, the system automatically creates them. |
||
Standby node |
|||||
Branch 2 |
Local node 2 |
Active node |
|||
Standby node |
|||||
Table 4 PRA trunks
Location |
NE |
Peer Office |
Trunk Type |
Office Route Selection Code |
Office Route |
CRCa |
Connection Locationb |
Headquarters |
Trunk gateway |
PSTN |
PRA |
0 |
0 |
No |
Local office: on the user side; PSTN: on the network side |
Branch 1 |
Local node 1 |
PSTN |
PRA |
0 |
0 |
No |
Local office: on the user side; PSTN: on the network side |
Branch 2 |
Local node 2 |
PSTN |
PRA |
0 |
0 |
No |
Local office: on the user side; PSTN: on the network side |
ϒ⁄a: indicates the cyclic redundancy code (CRC) for the unified gateway. The CRC must be the same as that of the peer device. ϒ⁄b: ensures that the value on the local device is different from that on the peer device. |
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Table 5 Prefix and number change
Location |
NE |
Prefix Type |
Prefix |
Office Route Selection Code |
Called Number Change |
Calling Number Change |
Remarks |
Headquarters |
Active node |
Intra-office call prefix |
8 |
- |
- |
- |
- |
2888 |
|||||||
National toll call prefix |
90 |
3: outgoing calls to the trunk gateway |
- |
Index 1: Changes the number to the automatic switchboard access code 28882999 of the headquarters. |
The national toll call rights can be assigned only to specified users by configuring the user rights level, preventing toll fraud. |
||
International toll call prefix |
900 |
- |
The international toll call rights can be assigned only to specified users by configuring the user rights level, preventing toll fraud. |
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Local outgoing call prefix |
9 |
- |
The central node does not delete the outgoing call prefix 9 for an outgoing call. If the call is rerouted to the branch, the prefix 9 is deleted on the local node. If the call is rerouted to the headquarters, the prefix 9 is deleted through the trunk gateway. |
||||
Outgoing call prefix: Users at branches call PSTN users at the headquarters. |
9010 (010 is the area code of the headquarters) |
- |
- |
||||
Outgoing call prefix: Users at the headquarters or branch 2 call PSTN users at branch 1. |
90571 (0571 is the area code of branch 1) |
1: outgoing calls to branch 1 |
- |
- |
- |
||
Outgoing call prefix: Users at the headquarters or branch 1 call PSTN users at branch 2. |
9021 (021 is the area code of branch 2) |
2: outgoing calls to branch 2 |
- |
- |
- |
||
Trunk gateway |
National toll call prefix |
90 |
0 |
Index 0: Deletes the first digit of a number. |
- |
Outgoing calls to the PSTN |
|
International toll call prefix |
900 |
||||||
Local outgoing call prefix |
9 |
||||||
Local outgoing call prefix |
2888 |
1 |
- |
- |
Outgoing calls to the active node |
||
Branch 1 |
Local node 1 |
Intra-office call prefix |
8 |
- |
- |
- |
- |
Local regeneration prefix |
2888 |
The local regeneration prefix is the intra-office call prefix configured on the central node for users at the local node. |
|||||
National toll call prefix |
90 |
0 |
Index 0: Deletes the first digit of a number. |
Index 1: Changes the number to the automatic switchboard access code 28885999 of branch 1. |
Outgoing calls to the local PSTN. |
||
International toll call prefix |
900 |
||||||
Outgoing call prefix |
9 |
||||||
Outgoing call prefix |
90571 |
||||||
Branch 2 |
Local node 2 |
Intra-office call prefix |
8 |
- |
- |
- |
- |
Local regeneration prefix |
2888 |
The local regeneration prefix is the intra-office call prefix configured on the central node for users at the local node. |
|||||
National toll call prefix |
90 |
0 |
Index 0: Deletes the first digit of a number. |
Index 1: Changes the number to the automatic switchboard access code 28888999 of branch 2. |
Outgoing calls to the local PSTN. |
||
International toll call prefix |
900 |
||||||
Outgoing call prefix |
9 |
||||||
Outgoing call prefix |
9021 |
Table 6 Call sources
NE |
Call Source |
Remarks |
|
Active node |
1 |
Users at branch 1 belong to call source 1. |
Configures call rerouting analysis. When a user at branch 1 dials prefix 9 to make an outgoing call, the call is rerouted to local node 1. |
2 |
Users at branch 2 belong to call source 2. |
Configures call rerouting analysis. When a user at branch 2 dials prefix 9 to make an outgoing call, the call is rerouted to local node 2. |
|
Local node 1 |
1 |
The SIP trunk from local node 1 to the active node and standby node belongs to call source 1. |
Adds SIP trunks from the local nodes to the active node and standby node to call source 1. When a local node processes a call from this call source, the local node changes the call attribute of local regeneration prefix 288 to inter. |
Local node 2 |
1 |
The SIP trunk from local node 2 to the active node and standby node belongs to call source 1. |
Adds SIP trunks from the local nodes to the active node and standby node to call source 1. When a local node processes a call from this call source, the local node changes the call attribute of local regeneration prefix 288 to inter. |
Table 7 Boards
Location |
NE |
Board Type |
Slot Number |
Headquarters |
Trunk gateway |
MTU |
0 |
Branch 1 |
Local node 1 |
MTU |
0 |
ASI |
1 |
||
Branch 2 |
Local node 2 |
MTU |
0 |
ASI |
1 |
Parent Topic: Configuring the Unified Gateway Two-Node Cluster