| Serial Port Clock Rates Notes
- All rates listed in the tables are maximum rates.
- All rates listed are full duplex, unless otherwise noted.
- Any port that runs at 2 Mbps can connect to an E1.
- Aux ports run at a max of 38.4 Kbps on all routers except the 3600 which runs at 115.2
Kbps
1005
| High speed serial port |
2 Mbps (sync) 115.2 Kbps (async) |
2500 series
| Dual high speed serial ports |
2 Mbps on each port 4 Mbps on one port only; other port is
disabled |
| Low speed A/S ports |
128 Kbps on each S port (sync) 115.2 Kbps on each A port
(async) |
1601
| On-board high speed serial port |
2.048 Mbps (sync) 115.2 Kbps (async) |
WICs (1600/3600)
| 1T serial WIC |
2.048 Mbps (sync) 115.2 Kbps (async) - 1600 only |
3600 series
| A/S network modules (4 & 8 ports) |
128 Kbps on each S port (sync) 115.2 Kbps on each A port (async) |
| Async network modules (16 & 32) |
134 Kbps on each port |
| 4T network module |
2 Mbps on each port simultaneously 8 Mbps on any one port |
Examples (for each 4 port module):
- One port at 8 Mbps; the other 3 ports are disabled.
- Two ports at 4 Mbps each; the other 2 ports are disabled
- Four ports at 2 Mbps each
4000 series
| 2T NPM |
2 Mbps maximum on any port |
| 4T NPM |
8 Mbps per NPM 4 Mbps on any one port |
| 4 port G.703/G.704 NPM |
2 Mbps maximum on any port |
| 2T/16S NPM |
2 Mbps maximum on each T port simultaneously 128 Kbps on each S port
(sync)
115.2 Kbps on each A port (async) |
Examples (quad port NPM):
- Two ports at 4 Mbps each; the other 2 ports are disabled.
- Four ports at 2 Mbps each.
7000/7500 series
| Four port FSIP (one four port module) |
6.312 Mbps per four port module 6.312 Mbps any one port |
| Eight port FSIP (two four port modules) |
6.312 Mbps per four port module 6.312 Mbps on any one port |
Examples (for each 4 port module):
- One port at J2; the other 3 ports are disabled.
- Three ports at E1 each; the other port is disabled.
- Four ports at T1 each.
Port Adapters (7200, RSP7000, 7500)
| Four port (PA-4T) |
6.312 Mbps per four port PA 6.312 Mbps on any one port |
| NEW Four port (PA-4T+) |
8 Mbps per four port PA 8 Mbps on any one port |
| Eight port (PA-8T) |
16 Mbps per eight port PA 8 Mbps on any one port in the range 0 - 3
8 Mbps on any one port in the range 4 - 7 |
Examples (PA-4T):
- One port at J2; the other 3 ports are disabled.
- Three ports at E1 each; the other port is disabled.
- Four ports at T1 each.
Examples (PA-4T+):
- One port at 8 Mbps; the other 3 ports are disabled.
- Two ports at 4 Mbps each; the other 2 ports are disabled.
- Four ports at 2 Mbps each.
Examples (PA-8T):
- Two ports at 8 Mbps each; the other 6 ports are disabled.
- Four ports at 4 Mbps each; the other 4 ports are disabled.
- Eight ports at 2 Mbps each.
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