
Chapter 4 Gateway Selection
Site-Specific Gateway Requirements
4-12
Cisco IP Telephony Network Design Guide
78-11103-03
Table 4-3 Digital Gateways by Site-Specific Features
Gateway T1 CAS
1
1. Channel-associated signaling
E1/R2 E1 CAS
User Side
PRI
2
2. Primary Rate Interface
Network
Side PRI
User
Side
BRI
3
3. Basic Rate Interface
Network
Side BRI
Digital
DID
4
/CLID
5
4. Direct inward dialing
5. Calling line ID
VG200 In
H.323v2
mode
No In
H.323v2
mode
No No No No N/A
Cisco Access
DT-24+ and
Cisco Access
DE-30+
No No No Yes Yes No No Yes
Cisco 1750 No No No No No Future Future N/A
Cisco 3810 V3 Yes No Yes No No Yes No Yes
Cisco 2600 Yes 12.1(3)T 12.1(3)T 12.1(3)T 12.1(3)T Yes 12.2(1)T Yes/Yes
6
6. For T1 CAS CLID, FG-D is required. FG-D is a trunk-side local access transport area (LATA) that provides call supervision
to an interexchange carrier (IC), a uniform access code (10XXX), optional calling-party identification, recording of access
charge billing details, and presubscription to a customer-specified IC. FG-D is also used for 800 inbound wide area
telecommunications service (WATS) and travel card service, and it provides automatic number identification (ANI) for
billing purposes.
Cisco 3600 Yes 12.1(3)T 12.1(3)T 12.1(3)T 12.1(3)T Yes 12.2(1)T Yes/Yes
6
Cisco 7200 Yes 12.1(3)T 12.1(3)T 12.1(3)T 12.1(3)T No No Yes/Yes
6
Cisco 7500 Yes 12.1(3)T 12.1(3)T 12.1(3)T 12.1(3)T No No Yes/Yes
6
Cisco AS5300 Yes Yes Yes Yes 12.0.7T No No Yes/Yes
Catalyst 4000
WS-X4604-GWY
gateway module
Yes Yes Yes Yes Yes Future Future Yes/Yes
6
Catalyst 6000
WS-X6608-T1 and
WS-X6608-E1
gateway modules
No No No Yes Yes No No Yes/Yes
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